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Red rows: To be designed (or selected). Yellow rows: Not yet purchased, short of stock, or in production. Green rows: Ready for iKAGRA. White rows: Ready for bKAGRA. Pink rows: status unknown ||Name ||Height ||Schematics ||Power ||Description ||Needed<<BR>>(iKAGRA) ||Needed<<BR>>(bKAGRA) ||In stock ||Status || ||||||||||||||||||<style="text-align:center">for PSL || ||<#66ff00>RF Oscillator Source ||<#66ff00>2U ||<#66ff00>[[http://www.keysight.com/ja/pd-799470-pn-N5181A/mxg-rf-analog-signal-generator?nid=-536906709.536910813.00&cc=JP&lc=jpn|Agilent N5181A]] ||<#66ff00>AC ||<#66ff00>for the time being ||<#66ff00>3 ||<#66ff00>7 ||<#66ff00>5 ||<#66ff00>Stored in ICRR and Hongo || ||<#ffff00>RF PD ||<#ffff00>- ||<#ffff00>[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1280|JGW-D1201280]] ||<#ffff00>+-18V ||<#ffff00>has RF HI, RF LOW outputs(BNC), and DC output(Dsub 9pin, which includes +-18V) ||<#ffff00>5 ||<#ffff00>17 ||<#ffff00>3+40 ||<#ffff00>3 handmaking done; 40 arrived with diodes; test and housing in progress || ||<#66ff00>DC PD ||<#66ff00>- ||<#66ff00>[[http://www.thorlabs.co.jp/thorproduct.cfm?partnumber=PDA100A|Thorlabs PDA100A]] ||<#66ff00>+-12V ||<#66ff00>has DC output(BNC), needs power cable [[http://www.thorlabs.co.jp/thorproduct.cfm?partnumber=PDA-C-72|PDA-C-72]] ||<#66ff00>4 ||<#66ff00>7 ||<#66ff00>6 ||<#66ff00>At Kamioka Branch || ||TTFSS ||- ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1823|JGW-D1301823]] ||from Interface || ||1 ||1 ||1 ||At the site || ||TTFSS Interface ||- ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1831|JGW-D1301831]] ||+-17V,+-24V,+-200V || ||1 ||1 ||1 ||At the site || ||AOM Driver ||- ||Crystal Technology 1110AF-AEFO-1.5 ||+28V || ||1 ||1 ||1 ||At the site || ||PZT Driver ||- ||? ||AC ||for periscope PZTs, 2ch ||1 ||1 ||1 ||At the site?? || ||PMC Servo Board ||- ||([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1823|JGW-D1301823]]) ||from Interface || ||1 ||1 ||1 ||At the site (basically copy of TTFSS) || ||PMC Servo Board Interface ||- ||([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1831|JGW-D1301831]]) ||+-17V,+-24V,+-200V || ||1 ||1 ||1 ||At the site (basically copy of TTFSS Interface) || ||||||||||||||||||<style="text-align:center">for IMC LSC || ||<#66ff00>Quad IQ Demodulator LSC ||<#66ff00>1U ||<#66ff00>[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2412|JGW-D1402412]] ||<#66ff00>+-18V ||<#66ff00>4 LOs for 4 demodulation channels ||<#66ff00>0 ||<#66ff00>7 ||<#66ff00>5 ||<#66ff00>At Kamioka Branch || ||<#ff0000>Dual IQ Demodulator ||<#ff0000>1U ||<#ff0000>([[https://dcc.ligo.org/LIGO-E1100044/public|LIGO-E1100044]]) ||<#ff0000>+-18V ||<#ff0000>2 LOs for 2 demodulation channels, fast verison ||<#ff0000>2 ||<#ff0000>3 ||<#ff0000> ||<#ff0000>use QuadIQ for now || ||<#66ff00>Common Mode Servo Board ||<#66ff00>2U ||<#66ff00>[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3705|JGW-D1503705]] ||<#66ff00>+-17V,+-24V ||<#66ff00>2 inputs, slow and fast outputs ||<#66ff00>1 ||<#66ff00>4 ||<#66ff00>1 ||<#66ff00>At Kamioka Branch || ||RF PD Interface Board ||1U ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3818|JGW-D1503818]] ||+-18V ||for ribbon cables from 4 RF PDs, with whitening filter ||3 ||6 ||10 ||At Kamioka Branch|| ||||||||||||||||||<style="text-align:center">for IMC ASC, better PSL || ||<#66ff00>RF QPD ||<#66ff00>- ||<#66ff00>[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2631|JGW-D1402631]] ||<#66ff00>+-18V ||<#66ff00>should have 4 RF outputs, 4 DC outputs ||<#66ff00>2 ||<#66ff00>14 ||<#66ff00>5+15 ||<#66ff00>5 for IMC, 10 for IFO at Kamioka Branch || ||RF QPD Interface Board ||1U ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3814|JGW-D1503814]] ||+- 18V ||for ribbon cables from 4 RF QPDs, without whitening filter ||1 ||4 ||5 ||At Kamioka Branch|| ||<#66ff00>DC QPD ||<#66ff00>- ||<#66ff00>[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2411|JGW-D1402411]] ||<#66ff00>+-15V ||<#66ff00>has 4 DC outputs(Dsub 15pin, which includes +-15V) use oplev QPD for the time being ||<#66ff00>6 ||<#66ff00>12 ||<#66ff00> ||<#66ff00>40 arrived(including ones for oplevs) || ||<#ffff00>DC QPD Interface Board ||<#ffff00>1U ||<#ffff00>[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2087|JGW-D1302087]] ||<#ffff00>+-18V ||<#ffff00>for ribbon cables from 2 DC QPDs, with whitening filter ||<#ffff00>3 ||<#ffff00>8 ||<#ffff00>10 ||<#ffff00>At Kamioka Branch || ||<#ffff00>Quad IQ Demodulator ASC ||<#ffff00>1U ||<#ffff00>[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2412|JGW-D1402412]] ||<#ffff00>+-18V ||<#ffff00>1 LO for 4 demodulation channels ||<#ffff00>2 ||<#ffff00>22 ||<#ffff00>0 ||<#ffff00>use LSC ones for now || ||<#ffff00>RF Distribution Amplifier ||<#ffff00>1U ||<#ffff00>([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4460|JGW-D1504460]]) ||<#ffff00>+-24V ||<#ffff00>split into 8 ||<#ffff00>2 ||<#ffff00>10 ||<#ffff00> ||<#ffff00>Components for 1 purchased (RF amp + 8way splitter) || ||<#ff0000>Delay Line Phase Shifter ||<#ff0000>1U ||<#ff0000>([[https://dcc.ligo.org/LIGO-D0900128/public|LIGO-D0900128]]) ||<#ff0000>+15V? ||<#ff0000>for 2 channels ||<#ff0000>1 ||<#ff0000>3 ||<#ff0000> ||<#ff0000> || ||<#ff0000>DC PD Interface Board ||<#ff0000>- ||<#ff0000>([[https://dcc.ligo.org/LIGO-D1002932|LIGO-D1002932]]) ||<#ff0000>+-12V ||<#ff0000>for 4 DC PDs, without whitening filter, on output tables ||<#ff0000>3 ||<#ff0000>6 ||<#ff0000> ||<#ff0000> || ||||||||||||||||||<style="text-align:center">for DRFPMI || ||<#ff0000>Frequency Doubler ||<#ff0000>1U ||<#ff0000>([[https://dcc.ligo.org/LIGO-D1002178/public|LIGO-D1002178]]) ||<#ff0000>+-17V,+-24V ||<#ff0000>for sideband power monitor ||<#ff0000>0 ||<#ff0000>2 ||<#ff0000> ||<#ff0000> || ||<#ff0000>Difference Frequency Generator ||<#ff0000>1U? ||<#ff0000> ||<#ff0000> ||<#ff0000>for nonresonant sidebands, 2 channels ||<#ff0000>0 ||<#ff0000>1 ||<#ff0000> ||<#ff0000> || ||||||||||||||||||<style="text-align:center">for ALS || ||<#ff0000>RF PD for green ||<#ff0000>- ||<#ff0000>([[https://dcc.ligo.org/LIGO-D1002969/public|LIGO-D1002969]]) ||<#ff0000> ||<#ff0000>use IR circuit but change PD? ||<#ff0000>0 ||<#ff0000>2 ||<#ff0000> ||<#ff0000> || ||<#ff0000>BB PD for IR ||<#ff0000>- ||<#ff0000>([[https://dcc.ligo.org/LIGO-D1002969/public|LIGO-D1002969]]) ||<#ff0000> ||<#ff0000>for ALS PLL (we use IR beat for KAGRA, while aLIGO uses green beat) ||<#ff0000>0 ||<#ff0000>2 ||<#ff0000> ||<#ff0000> || ||<#ff0000>BB PD Interface Board ||<#ff0000>1U? ||<#ff0000>([[https://dcc.ligo.org/LIGO-D1102079/public|LIGO-D1102079]]) ||<#ff0000> ||<#ff0000>same for RF PD Interface? ||<#ff0000>0 ||<#ff0000>1 ||<#ff0000> ||<#ff0000> || ||<#ffff00>DC PD for green ||<#ffff00>- ||<#ffff00>[[http://www.thorlabs.co.jp/thorproduct.cfm?partnumber=PDA100A|Thorlabs PDA100A]] ||<#ffff00>+-12V ||<#ffff00>has DC output, needs power cable [[http://www.thorlabs.co.jp/thorproduct.cfm?partnumber=PDA-C-72|PDA-C-72]] ||<#ffff00>0 ||<#ffff00>2 ||<#ffff00> ||<#ffff00> || ||<#ffff00>DC QPD for green ||<#ffff00>- ||<#ffff00>[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2411|JGW-D1402411]] ||<#ffff00>+-15V ||<#ffff00>has 4 DC outputs(Dsub 15pin, which includes +-15V) use oplev QPD for the time being ||<#ffff00>0 ||<#ffff00>4 ||<#ffff00> ||<#ffff00>Requested to AEL(36 including IR ones) || ||<#ff0000>Phase Frequency Discriminator ||<#ff0000>1U ||<#ff0000>([[https://dcc.ligo.org/LIGO-D1002476/public|LIGO-D1002476]]) ||<#ff0000>+-17V,+-24V ||<#ff0000>for ALS, 2 channels ||<#ff0000>0 ||<#ff0000>1 ||<#ff0000> ||<#ff0000> || ||<#ff0000>VCO with PLL ||<#ff0000>2U ||<#ff0000>([[https://dcc.ligo.org/LIGO-D0900605/public|LIGO-D0900605]],[[https://dcc.ligo.org/LIGO-D1300812/public|LIGO-D1300812]]) ||<#ff0000>+-17V,+-24V ||<#ff0000> ||<#ff0000>0 ||<#ff0000>2 ||<#ff0000> ||<#ff0000> || ||||||||||||||||||<style="text-align:center">for better sensitivity || ||<#ff0000>DC PD in vacuum ||<#ff0000>- ||<#ff0000>([[https://dcc.ligo.org/LIGO-D1101059|LIGO-D1101059]]) ||<#ff0000> ||<#ff0000>for ISS and OMCTVAC ||<#ff0000>0 ||<#ff0000>3 ||<#ff0000> ||<#ff0000> || ||<#ff0000>DC QPD in vacuum ||<#ff0000>- ||<#ff0000>([[https://dcc.ligo.org/LIGO-T0900423/public|LIGO-T0900423]]) ||<#ff0000> ||<#ff0000>bare QPD without amplifier ||<#ff0000>0 ||<#ff0000>10 ||<#ff0000> ||<#ff0000> || ||<#ff0000>DC QPD in vacuum for green ||<#ff0000>- ||<#ff0000>([[https://dcc.ligo.org/LIGO-T0900423/public|LIGO-T0900423]]) ||<#ff0000> ||<#ff0000>bare QPD without amplifier ||<#ff0000>0 ||<#ff0000>4 ||<#ff0000> ||<#ff0000> || ||<#ff0000>DC PD Amplifier ||<#ff0000>? ||<#ff0000> ||<#ff0000>+-18V ||<#ff0000>for DC PD in vacuum ||<#ff0000>0 ||<#ff0000>2 ||<#ff0000> ||<#ff0000> || ||<#ff0000>DC QPD Amplifier ||<#ff0000>1U ||<#ff0000>([[https://dcc.ligo.org/LIGO-D1002481/public|LIGO-D1002481]]) ||<#ff0000>+-18V ||<#ff0000>for ribbon cables from 2 DC QPDs in vacuum ||<#ff0000>0 ||<#ff0000>7 ||<#ff0000> ||<#ff0000> || ||<#ff0000>ISS Board ||<#ff0000>? ||<#ff0000>([[https://dcc.ligo.org/LIGO-D1001985|LIGO-D1001985]], [[https://dcc.ligo.org/LIGO-D1300439|LIGO-D1300439]]) ||<#ff0000> ||<#ff0000> ||<#ff0000>0 ||<#ff0000>1 ||<#ff0000> ||<#ff0000> || ||<#ff0000>OMC Servo Board ||<#ff0000>? ||<#ff0000> ||<#ff0000> ||<#ff0000> ||<#ff0000>0 ||<#ff0000>1 ||<#ff0000> ||<#ff0000> || ||<#ff0000>RF Oscillator Source(Wenzel OCXO) ||<#ff0000>2U ||<#ff0000>([[https://dcc.ligo.org/LIGO-D080702/public|LIGO-D080702]]) ||<#ff0000> ||<#ff0000> ||<#ff0000>0 ||<#ff0000>7 ||<#ff0000> ||<#ff0000> || ||<#ff0000>EOM/AOM Driver ||<#ff0000>? ||<#ff0000>([[https://dcc.ligo.org/LIGO-E1400445/public|LIGO-E1400445]]) ||<#ff0000> ||<#ff0000>for RF AM stabilization, modulation amplitude adjustment ||<#ff0000>0 ||<#ff0000>3 ||<#ff0000> ||<#ff0000> || * References: [[https://awiki.ligo-wa.caltech.edu/aLIGO/RfDesign|awiki/RfDesign]], [[https://awiki.ligo-wa.caltech.edu/aLIGO/LSC_Photodetectors|awiki/LSC_Photodetectors]], [[https://dcc.ligo.org/LIGO-D1200666|Cabling LIGO-D1200666]] === TO DO === * Details of ISS, ALS, OMC servo are uncertain at this point == Photodetector list == * [[KAGRA/Subgroups/MIF/AEL/Photodetectors|Photodetectors]] * (Original) List of the Interferometer Detection Ports [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2982|JGW-T1402982]] == Cable list == * List of the ISC cables is available at [[https://docs.google.com/spreadsheets/d/1VPkv64gDrbhSX4LiO5aNc-miSf3h3pl1dRQPKUhnuCs/|this Google Spreadsheet]]. |
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* KAGRA ISC Electrical Components Layout [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2986|JGW-D1402986]] * Position of digital system racks [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=425|JGW-D1100425]] * What's inside the digital system racks [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2831|JGW-D1402831]] === PSL === See [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2984|JGW-D1402984]] for cabling. ||Name ||Height ||Description ||to ADC ||from DAC ||iKAGRA? || ||RF Oscillator Source ||2U ||for fPMC sideband || || ||yes || ||(RF splitter) ||- ||split fPMC into 2 for PSL EOM, PMCR LO || || ||yes || ||PMC Servo Board ||- ||for PMC servo, receives PMCR, needs fPMC LO || || ||yes || ||PMC Servo Board Interface ||- ||for PMC Servo Board || || ||yes || ||TTFSS ||- ||for Refcav servo, receives REFCAVR, needs fIMC LO from IO rack || || ||yes || ||TTFSS Interface ||- ||for TTFSS ||?? ||?? ||yes || ||DC PD Interface Board ||- ||for PMCT, REFCAVT, (2ch left) || || ||yes || ||PZT Driver ||- ||for periscope PZTs || ||BNCx2 ||yes || === Output Tables === Interface boxes for Thorlabs DC PDs are located at the respective output tables. ||Name ||Height ||Description ||Location ||to ADC ||from DAC ||iKAGRA? || ||DC PD Interface Board ||- ||for IMCT, (3ch left) ||IMC TRANS table -> IO rack ||Dsubx1(no whitening) || ||yes || ||DC PD Interface Board ||- ||for IMMT1T, (3ch left) ||IMMT1T pylon -> MMT rack ||Dsubx1(no whitening) || ||yes || ||DC PD Interface Board ||- ||for TRX, TRX_GR, (2ch left) ||TRX table -> EX4 rack ||Dsubx1(no whitening) || || || ||DC PD Interface Board ||- ||for TRY, TRY_GR, (2ch left) ||TRY table -> EY4 rack ||Dsubx1(no whitening) || || || ||DC PD Interface Board ||- ||for OMCT, (3ch left) ||AS table -> AS rack? ||Dsubx1(no whitening) || || || === IO racks === Located between PSL and MCF chamber. Generates RF for fIMC, f1, f2, f3, 2*f1, 2*f2, f3-f1, f3-f2, fALSX, and fALSY. Has servo circuits for FRC, IMC, and ISS. Takes care of PD/QPDs on PSL, IMC REFL, and IMC TRANS tables. Also takes care of equivalent PD/QPDs in vacuum. ||Name ||Height ||Description ||to ADC ||from DAC ||iKAGRA? || ||||||||||||<style="text-align:center">PD/QPD || ||Dual IQ Demodulator ||1U ||for IMCR(fIMC), (1ch left) ||Dsubx1(no whitening) || ||yes || ||RF PD Interface Board ||1U ||for PMCR, REFCAVR, IMCR, (1ch left) ||Dsubx1(no whitening) || ||yes || ||RF QPD Interface Board ||1U ||for IMCR_A/B, (2ch left) ||Dsubx2(no whitening) || ||yes || ||DC QPD Interface Board ||1U ||for IP_A/B ||Dsubx2(whitened) || ||yes || ||DC QPD Interface Board ||1U ||for IMCT_A/B ||Dsubx2(whitened) || ||yes || ||DC QPD Amplifier ||1U ||for IMCTVAC_A/B ||Dsubx2(whitening) || || || ||||||||||||<style="text-align:center">fIMC || ||RF Oscillator Source ||2U ||for fIMC sideband (also for Refcav) || || ||yes || ||RF Distribution Amplifier ||1U ||for fIMC. to PSL EOM, to Delay Line for Refcav, to Delay Line for IMC LSC, to IQ Demod ASC x 2, (3ch left) || || ||yes || ||Delay Line Phase Shifter ||1U ||for TTFSS LO(Refcav lock), IMCR LO(IMC LSC) || || ||yes || ||Common Mode Servo Board ||2U ||for IMC servo ||Dsubx3(no whitening) ||Dsubx1 ||yes || ||Quad IQ Demodulator ASC ||1U ||for IMCR_A QPD(fIMC) ||Dsubx2(whitening) || ||yes || ||Quad IQ Demodulator ASC ||1U ||for IMCR_B QPD(fIMC) ||Dsubx2(whitening) || ||yes || ||||||||||||<style="text-align:center">f1 || ||RF Oscillator Source ||2U ||for f1 sideband || || ||yes || ||RF Distribution Amplifier ||1U ||for f1. to PSL EOM, to PSL EOAM, to MMT rack, to LSC racks, to Frequency Doubler, to Diff. Freq. Generator, (2ch left) || || ||yes || ||Frequency Doubler ||1U ||f1 to 2*f1 for ISC racks || || || || ||||||||||||<style="text-align:center">f2 || ||RF Oscillator Source ||2U ||for f2 sideband || || || || ||RF Distribution Amplifier ||1U ||for f2. to PSL EOM, to MMT rack to LSC racks, to Frequency Doubler, to Diff. Freq. Generator, (3ch left) || || || || ||Frequency Doubler ||1U ||f1 to 2*f1 for ISC racks || || || || ||||||||||||<style="text-align:center">f3 || ||RF Oscillator Source ||2U ||for f3 to splitter || || || || ||(RF splitter) ||- ||split f3 into 2 for Diff. Freq. Generator || || || || ||Diff. Freq. Generator ||1U? ||make f3-f1 for ISC racks, make f3-f2 for ISC racks || || || || ||||||||||<style="text-align:center">fALSX,fALSY || ||RF Oscillator Source ||2U ||for fALSX sideband for ISC racks || || || || ||RF Oscillator Source ||2U ||for fALSY sideband for ISC racks || || || || ||||||||||||<style="text-align:center">Others || ||ISS Board ||?? || ||?? ||?? || || === MMT rack === Located near PRM chamber. Takes care of PD/QPDs on IMMT1 and IMMT2 tables. Also takes care of equivalent PD/QPDs in vacuum. ||Name ||Height ||Description ||to ADC ||from DAC ||iKAGRA? || ||||||||||||<style="text-align:center">PD/QPD || ||Quad IQ Demodulator LSC ||1U ||for IMMT2T(f1), IMMT2T(f2), (2ch left) ||Dsubx1(whitening) || || || ||RF PD Interface Board ||1U ||for IMMT2T, (3ch left) ||Dsubx1(no whitening) || ||yes || ||DC PD Amplifier ||1U ||for IMMT1TVAC, IMMT2TVAC, (2ch left) ||Dsubx1(whitening) || || || ||DC QPD Interface Board ||1U ||for IMMT2T_A/B ||Dsubx2(whitened) || ||yes || ||DC QPD Amplifier ||1U ||for IMMT2TVAC_A/B ||Dsubx2(whitening) || || || === ISC racks === Stands for LSC, ASC1, ASC2 and AUX racks located between PR3 and PR2 chambers. Has servo circuits for CARM, ALSX, and ALSY. Takes care of PD/QPDs on REFL, POP, POS, POX, POY, and AS tables. Also takes care of equivalent PD/QPDs in vacuum. ||Name ||Height ||Description ||to ADC ||from DAC ||iKAGRA? || ||||||||||||<style="text-align:center">PD/QPD || ||Dual IQ Demodulator ||1U ||for REFL(f1), REFL(f2) ||Dsubx1(no whitening) || ||yes || ||Dual IQ Demodulator ||1U ||for POP_GR(fALSY), POS_GR(fALSX) ||Dsubx1(no whitening) || || || ||Quad IQ Demodulator LSC ||1U ||for REFLNRSB(f3-f1), REFLNRSB(f3-f2), AS(f1), ASVAC(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator LSC ||1U ||for POP(f1), POP(f2), SPOP(2*f1), SPOP(2*f2) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator LSC ||1U ||for SPOS(2*f1), SPOS(2*f2), (2ch left) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator LSC ||1U ||for POX(f1), POX(f2), POY(f1), POY(f2) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator LSC ||1U ||for REFLVAC(f1), REFLVAC(f2), POPVAC(f1), POPVAC(f2) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator LSC ||1U ||for POXVAC(f1), POXVAC(f2), POYVAC(f1), POYVAC(f2) ||Dsubx2(whitening) || || || ||RF PD Interface Board ||1U ||for REFL, REFLNRSB, AS, SPOS ||Dsubx1(no whitening) || ||yes || ||RF PD Interface Board ||1U ||for POX, POY, POP, SPOP ||Dsubx1(no whitening) || || || ||RF PD Interface Board ||1U ||for POP_GR, POS_GR, POXVAC, POYVAC ||Dsubx1(no whitening) || || || ||RF PD Interface Board ||1U ||for REFLVAC, POPVAC, ASVAC, (1ch left) ||Dsubx1(no whitening) || || || ||BB PD Interface Board ||1U ||for PLLX, PLLY, (2ch left?) ||Dsubx1(no whitening) || || || ||RF QPD Interface Board ||1U ||for REFL_A/B, POP_A/B ||Dsubx4(no whitening) || || || ||RF QPD Interface Board ||1U ||for AS_A/B, ASVAC_A/B ||Dsubx4(no whitening) || || || ||RF QPD Interface Board ||1U ||for REFLVAC_A/B, POPVAC_A/B ||Dsubx4(no whitening) || || || ||||||||||||<style="text-align:center">f1 || ||RF Distribution Amplifier ||1U ||for f1. to Delay Line for CARM, POP LO, POX LO, POY LO, AS LO, REFLVAC LO, ASVAC LO, to RF Dist. || || || || ||RF Distribution Amplifier ||1U ||for f1. to POPVAC LO, POXVAC LO, POYVAC LO, IQ Demod ASC x 3, to RF Dist. || || || || ||RF Distribution Amplifier ||1U ||for f1. IQ Demod ASC x 7, to RF Dist. || || || || ||RF Distribution Amplifier ||1U ||for f1. IQ Demod ASC x 2, (6ch left) || || || || ||Delay Line Phase Shifter ||1U ||for REFL LO(f1, CARM), REFL LO(f2, CARM) || || ||yes || ||Common Mode Servo Board ||2U ||for CARM servo ||Dsubx3(no whitening) ||Dsubx1 ||yes || ||Quad IQ Demodulator ASC ||1U ||for REFL_A QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for REFL_B QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for POP_A QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for POP_B QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for AS_A QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for AS_B QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for REFLVAC_A QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for REFLVAC_B QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for POPVAC_A QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for POPVAC_B QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for ASVAC_A QPD(f1) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for ASVAC_B QPD(f1) ||Dsubx2(whitening) || || || ||||||||||||<style="text-align:center">f2 || ||RF Distribution Amplifier ||1U ||for f2. to Delay Line for CARM, POP LO, POX LO, POY LO, REFLVAC LO, POPVAC LO, POXVAC LO, RF Dist. || || || || ||RF Distribution Amplifier ||1U ||for f2. to POYVAC LO, RF Dist., (6ch left) || || || || ||RF Distribution Amplifier ||1U ||for f2. IQ Demod ASC x 8 || || || || ||Quad IQ Demodulator ASC ||1U ||for REFL_A QPD(f2) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for REFL_B QPD(f2) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for POP_A QPD(f2) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for POP_B QPD(f2) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for REFLVAC_A QPD(f2) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for REFLVAC_B QPD(f2) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for POPVAC_A QPD(f2) ||Dsubx2(whitening) || || || ||Quad IQ Demodulator ASC ||1U ||for POPVAC_B QPD(f2) ||Dsubx2(whitening) || || || ||||||||||<style="text-align:center">2*f1,2*f2 || ||(RF splitter) ||- ||split 2*f1 into 2 for SPOP LO, SPOS LO || || || || ||(RF splitter) ||- ||split 2*f2 into 2 for SPOP LO, SPOS LO || || || || ||||||||||||<style="text-align:center">f3-f1,f3-f2 || ||||||||||||<style="text-align:center"> || ||||||||||||<style="text-align:center">fALSX,fALSY || ||(RF splitter) ||- ||split fALSX into 2 for POP EOM, Delay Line for ALSX || || || || ||Delay Line Phase Shifter ||1U ||for POP_GR LO(ALSX), POS_GR LO(ALSY) || || || || ||Common Mode Servo Board ||2U ||for ALSX servo ||Dsubx3(no whitening) ||Dsubx1 || || ||(RF splitter) ||- ||split fALSY into 2 for POS EOM, Delay Line for ALSY || || || || ||Common Mode Servo Board ||2U ||for ALSY servo ||Dsubx3(no whitening) ||Dsubx1 || || ||Phase Frequency Discriminator ||1U ||for ALSX, ALSY ||?? ||?? || || ||VCO with PLL ||2U ||for ALSX ||?? ||?? || || ||VCO with PLL ||2U ||for ALSY ||?? ||?? || || === EX4 rack === Located close to EXC chamber. Takes care of PD/QPDs on TRX table. Also takes care of equivalent PD/QPDs in vacuum. ||Name ||Height ||Description ||to ADC ||from DAC ||iKAGRA? || ||||||||||||<style="text-align:center">PD/QPD || ||DC QPD Interface Board ||1U ||for TRX_A/B ||Dsubx2(whitened) || || || ||DC QPD Interface Board ||1U ||for TRX_GR_A/B ||Dsubx2(whitened) || || || ||DC QPD Amplifier ||1U ||for TRXVAC_A/B ||Dsubx2(whitening) || || || ||DC QPD Amplifier ||1U ||for TRXVAC_GR_A/B ||Dsubx2(whitening) || || || === EY4 rack === Located close to EYC chamber. Components should be the same as those in EX4. === AS rack === Should be located close to OMM chamber. Takes care of PD/QPDs for OMC servo. ||Name ||Height ||Description ||to ADC ||from DAC ||iKAGRA? || ||||||||||||<style="text-align:center">PD/QPD || ||DC PD Amplifier ||- ||for OMCTVAC, (3ch left) ||Dsubx1(whitening) || || || ||DC QPD Interface Board ||1U ||for OMCT_A/B ||Dsubx2(whitened) || || || ||DC QPD Amplifier ||1U ||for OMCTVAC_A/B ||Dsubx2(whitening) || || || ||||||||||||<style="text-align:center">Others || ||OMC Servo board ||?? ||for OMC lock ||?? ||?? || || |
Analog Electronics for Interferometer Control
Electronics
Red rows: To be designed (or selected). Yellow rows: Not yet purchased, short of stock, or in production. Green rows: Ready for iKAGRA. White rows: Ready for bKAGRA. Pink rows: status unknown
Name |
Height |
Schematics |
Power |
Description |
Needed |
Needed |
In stock |
Status |
for PSL |
||||||||
RF Oscillator Source |
2U |
AC |
for the time being |
3 |
7 |
5 |
Stored in ICRR and Hongo |
|
RF PD |
- |
+-18V |
has RF HI, RF LOW outputs(BNC), and DC output(Dsub 9pin, which includes +-18V) |
5 |
17 |
3+40 |
3 handmaking done; 40 arrived with diodes; test and housing in progress |
|
DC PD |
- |
+-12V |
has DC output(BNC), needs power cable PDA-C-72 |
4 |
7 |
6 |
At Kamioka Branch |
|
TTFSS |
- |
from Interface |
|
1 |
1 |
1 |
At the site |
|
TTFSS Interface |
- |
+-17V,+-24V,+-200V |
|
1 |
1 |
1 |
At the site |
|
AOM Driver |
- |
Crystal Technology 1110AF-AEFO-1.5 |
+28V |
|
1 |
1 |
1 |
At the site |
PZT Driver |
- |
? |
AC |
for periscope PZTs, 2ch |
1 |
1 |
1 |
At the site?? |
PMC Servo Board |
- |
from Interface |
|
1 |
1 |
1 |
At the site (basically copy of TTFSS) |
|
PMC Servo Board Interface |
- |
+-17V,+-24V,+-200V |
|
1 |
1 |
1 |
At the site (basically copy of TTFSS Interface) |
|
for IMC LSC |
||||||||
Quad IQ Demodulator LSC |
1U |
+-18V |
4 LOs for 4 demodulation channels |
0 |
7 |
5 |
At Kamioka Branch |
|
Dual IQ Demodulator |
1U |
+-18V |
2 LOs for 2 demodulation channels, fast verison |
2 |
3 |
|
use QuadIQ for now |
|
Common Mode Servo Board |
2U |
+-17V,+-24V |
2 inputs, slow and fast outputs |
1 |
4 |
1 |
At Kamioka Branch |
|
RF PD Interface Board |
1U |
+-18V |
for ribbon cables from 4 RF PDs, with whitening filter |
3 |
6 |
10 |
At Kamioka Branch |
|
for IMC ASC, better PSL |
||||||||
RF QPD |
- |
+-18V |
should have 4 RF outputs, 4 DC outputs |
2 |
14 |
5+15 |
5 for IMC, 10 for IFO at Kamioka Branch |
|
RF QPD Interface Board |
1U |
+- 18V |
for ribbon cables from 4 RF QPDs, without whitening filter |
1 |
4 |
5 |
At Kamioka Branch |
|
DC QPD |
- |
+-15V |
has 4 DC outputs(Dsub 15pin, which includes +-15V) use oplev QPD for the time being |
6 |
12 |
|
40 arrived(including ones for oplevs) |
|
DC QPD Interface Board |
1U |
+-18V |
for ribbon cables from 2 DC QPDs, with whitening filter |
3 |
8 |
10 |
At Kamioka Branch |
|
Quad IQ Demodulator ASC |
1U |
+-18V |
1 LO for 4 demodulation channels |
2 |
22 |
0 |
use LSC ones for now |
|
RF Distribution Amplifier |
1U |
+-24V |
split into 8 |
2 |
10 |
|
Components for 1 purchased (RF amp + 8way splitter) |
|
Delay Line Phase Shifter |
1U |
+15V? |
for 2 channels |
1 |
3 |
|
|
|
DC PD Interface Board |
- |
+-12V |
for 4 DC PDs, without whitening filter, on output tables |
3 |
6 |
|
|
|
for DRFPMI |
||||||||
Frequency Doubler |
1U |
+-17V,+-24V |
for sideband power monitor |
0 |
2 |
|
|
|
Difference Frequency Generator |
1U? |
|
|
for nonresonant sidebands, 2 channels |
0 |
1 |
|
|
for ALS |
||||||||
RF PD for green |
- |
|
use IR circuit but change PD? |
0 |
2 |
|
|
|
BB PD for IR |
- |
|
for ALS PLL (we use IR beat for KAGRA, while aLIGO uses green beat) |
0 |
2 |
|
|
|
BB PD Interface Board |
1U? |
|
same for RF PD Interface? |
0 |
1 |
|
|
|
DC PD for green |
- |
+-12V |
has DC output, needs power cable PDA-C-72 |
0 |
2 |
|
|
|
DC QPD for green |
- |
+-15V |
has 4 DC outputs(Dsub 15pin, which includes +-15V) use oplev QPD for the time being |
0 |
4 |
|
Requested to AEL(36 including IR ones) |
|
Phase Frequency Discriminator |
1U |
+-17V,+-24V |
for ALS, 2 channels |
0 |
1 |
|
|
|
VCO with PLL |
2U |
+-17V,+-24V |
|
0 |
2 |
|
|
|
for better sensitivity |
||||||||
DC PD in vacuum |
- |
|
for ISS and OMCTVAC |
0 |
3 |
|
|
|
DC QPD in vacuum |
- |
|
bare QPD without amplifier |
0 |
10 |
|
|
|
DC QPD in vacuum for green |
- |
|
bare QPD without amplifier |
0 |
4 |
|
|
|
DC PD Amplifier |
? |
|
+-18V |
for DC PD in vacuum |
0 |
2 |
|
|
DC QPD Amplifier |
1U |
+-18V |
for ribbon cables from 2 DC QPDs in vacuum |
0 |
7 |
|
|
|
ISS Board |
? |
|
|
0 |
1 |
|
|
|
OMC Servo Board |
? |
|
|
|
0 |
1 |
|
|
RF Oscillator Source(Wenzel OCXO) |
2U |
|
|
0 |
7 |
|
|
|
EOM/AOM Driver |
? |
|
for RF AM stabilization, modulation amplitude adjustment |
0 |
3 |
|
|
References: awiki/RfDesign, awiki/LSC_Photodetectors, Cabling LIGO-D1200666
TO DO
- Details of ISS, ALS, OMC servo are uncertain at this point
Photodetector list
(Original) List of the Interferometer Detection Ports JGW-T1402982
Cable list
List of the ISC cables is available at this Google Spreadsheet.
For each rack
KAGRA ISC Electrical Components Layout JGW-D1402986
Position of digital system racks JGW-D1100425
What's inside the digital system racks JGW-D1402831
PSL
See JGW-D1402984 for cabling.
Name |
Height |
Description |
to ADC |
from DAC |
iKAGRA? |
RF Oscillator Source |
2U |
for fPMC sideband |
|
|
yes |
(RF splitter) |
- |
split fPMC into 2 for PSL EOM, PMCR LO |
|
|
yes |
PMC Servo Board |
- |
for PMC servo, receives PMCR, needs fPMC LO |
|
|
yes |
PMC Servo Board Interface |
- |
for PMC Servo Board |
|
|
yes |
TTFSS |
- |
for Refcav servo, receives REFCAVR, needs fIMC LO from IO rack |
|
|
yes |
TTFSS Interface |
- |
for TTFSS |
?? |
?? |
yes |
DC PD Interface Board |
- |
for PMCT, REFCAVT, (2ch left) |
|
|
yes |
PZT Driver |
- |
for periscope PZTs |
|
BNCx2 |
yes |
Output Tables
Interface boxes for Thorlabs DC PDs are located at the respective output tables.
Name |
Height |
Description |
Location |
to ADC |
from DAC |
iKAGRA? |
DC PD Interface Board |
- |
for IMCT, (3ch left) |
IMC TRANS table -> IO rack |
Dsubx1(no whitening) |
|
yes |
DC PD Interface Board |
- |
for IMMT1T, (3ch left) |
IMMT1T pylon -> MMT rack |
Dsubx1(no whitening) |
|
yes |
DC PD Interface Board |
- |
for TRX, TRX_GR, (2ch left) |
TRX table -> EX4 rack |
Dsubx1(no whitening) |
|
|
DC PD Interface Board |
- |
for TRY, TRY_GR, (2ch left) |
TRY table -> EY4 rack |
Dsubx1(no whitening) |
|
|
DC PD Interface Board |
- |
for OMCT, (3ch left) |
AS table -> AS rack? |
Dsubx1(no whitening) |
|
|
IO racks
Located between PSL and MCF chamber. Generates RF for fIMC, f1, f2, f3, 2*f1, 2*f2, f3-f1, f3-f2, fALSX, and fALSY. Has servo circuits for FRC, IMC, and ISS. Takes care of PD/QPDs on PSL, IMC REFL, and IMC TRANS tables. Also takes care of equivalent PD/QPDs in vacuum.
Name |
Height |
Description |
to ADC |
from DAC |
iKAGRA? |
PD/QPD |
|||||
Dual IQ Demodulator |
1U |
for IMCR(fIMC), (1ch left) |
Dsubx1(no whitening) |
|
yes |
RF PD Interface Board |
1U |
for PMCR, REFCAVR, IMCR, (1ch left) |
Dsubx1(no whitening) |
|
yes |
RF QPD Interface Board |
1U |
for IMCR_A/B, (2ch left) |
Dsubx2(no whitening) |
|
yes |
DC QPD Interface Board |
1U |
for IP_A/B |
Dsubx2(whitened) |
|
yes |
DC QPD Interface Board |
1U |
for IMCT_A/B |
Dsubx2(whitened) |
|
yes |
DC QPD Amplifier |
1U |
for IMCTVAC_A/B |
Dsubx2(whitening) |
|
|
fIMC |
|||||
RF Oscillator Source |
2U |
for fIMC sideband (also for Refcav) |
|
|
yes |
RF Distribution Amplifier |
1U |
for fIMC. to PSL EOM, to Delay Line for Refcav, to Delay Line for IMC LSC, to IQ Demod ASC x 2, (3ch left) |
|
|
yes |
Delay Line Phase Shifter |
1U |
for TTFSS LO(Refcav lock), IMCR LO(IMC LSC) |
|
|
yes |
Common Mode Servo Board |
2U |
for IMC servo |
Dsubx3(no whitening) |
Dsubx1 |
yes |
Quad IQ Demodulator ASC |
1U |
for IMCR_A QPD(fIMC) |
Dsubx2(whitening) |
|
yes |
Quad IQ Demodulator ASC |
1U |
for IMCR_B QPD(fIMC) |
Dsubx2(whitening) |
|
yes |
f1 |
|||||
RF Oscillator Source |
2U |
for f1 sideband |
|
|
yes |
RF Distribution Amplifier |
1U |
for f1. to PSL EOM, to PSL EOAM, to MMT rack, to LSC racks, to Frequency Doubler, to Diff. Freq. Generator, (2ch left) |
|
|
yes |
Frequency Doubler |
1U |
f1 to 2*f1 for ISC racks |
|
|
|
f2 |
|||||
RF Oscillator Source |
2U |
for f2 sideband |
|
|
|
RF Distribution Amplifier |
1U |
for f2. to PSL EOM, to MMT rack to LSC racks, to Frequency Doubler, to Diff. Freq. Generator, (3ch left) |
|
|
|
Frequency Doubler |
1U |
f1 to 2*f1 for ISC racks |
|
|
|
f3 |
|||||
RF Oscillator Source |
2U |
for f3 to splitter |
|
|
|
(RF splitter) |
- |
split f3 into 2 for Diff. Freq. Generator |
|
|
|
Diff. Freq. Generator |
1U? |
make f3-f1 for ISC racks, make f3-f2 for ISC racks |
|
|
|
fALSX,fALSY |
|||||
RF Oscillator Source |
2U |
for fALSX sideband for ISC racks |
|
|
|
RF Oscillator Source |
2U |
for fALSY sideband for ISC racks |
|
|
|
Others |
|||||
ISS Board |
?? |
|
?? |
?? |
|
MMT rack
Located near PRM chamber. Takes care of PD/QPDs on IMMT1 and IMMT2 tables. Also takes care of equivalent PD/QPDs in vacuum.
Name |
Height |
Description |
to ADC |
from DAC |
iKAGRA? |
PD/QPD |
|||||
Quad IQ Demodulator LSC |
1U |
for IMMT2T(f1), IMMT2T(f2), (2ch left) |
Dsubx1(whitening) |
|
|
RF PD Interface Board |
1U |
for IMMT2T, (3ch left) |
Dsubx1(no whitening) |
|
yes |
DC PD Amplifier |
1U |
for IMMT1TVAC, IMMT2TVAC, (2ch left) |
Dsubx1(whitening) |
|
|
DC QPD Interface Board |
1U |
for IMMT2T_A/B |
Dsubx2(whitened) |
|
yes |
DC QPD Amplifier |
1U |
for IMMT2TVAC_A/B |
Dsubx2(whitening) |
|
|
ISC racks
Stands for LSC, ASC1, ASC2 and AUX racks located between PR3 and PR2 chambers. Has servo circuits for CARM, ALSX, and ALSY. Takes care of PD/QPDs on REFL, POP, POS, POX, POY, and AS tables. Also takes care of equivalent PD/QPDs in vacuum.
Name |
Height |
Description |
to ADC |
from DAC |
iKAGRA? |
PD/QPD |
|||||
Dual IQ Demodulator |
1U |
for REFL(f1), REFL(f2) |
Dsubx1(no whitening) |
|
yes |
Dual IQ Demodulator |
1U |
for POP_GR(fALSY), POS_GR(fALSX) |
Dsubx1(no whitening) |
|
|
Quad IQ Demodulator LSC |
1U |
for REFLNRSB(f3-f1), REFLNRSB(f3-f2), AS(f1), ASVAC(f1) |
Dsubx2(whitening) |
|
|
Quad IQ Demodulator LSC |
1U |
for POP(f1), POP(f2), SPOP(2*f1), SPOP(2*f2) |
Dsubx2(whitening) |
|
|
Quad IQ Demodulator LSC |
1U |
for SPOS(2*f1), SPOS(2*f2), (2ch left) |
Dsubx2(whitening) |
|
|
Quad IQ Demodulator LSC |
1U |
for POX(f1), POX(f2), POY(f1), POY(f2) |
Dsubx2(whitening) |
|
|
Quad IQ Demodulator LSC |
1U |
for REFLVAC(f1), REFLVAC(f2), POPVAC(f1), POPVAC(f2) |
Dsubx2(whitening) |
|
|
Quad IQ Demodulator LSC |
1U |
for POXVAC(f1), POXVAC(f2), POYVAC(f1), POYVAC(f2) |
Dsubx2(whitening) |
|
|
RF PD Interface Board |
1U |
for REFL, REFLNRSB, AS, SPOS |
Dsubx1(no whitening) |
|
yes |
RF PD Interface Board |
1U |
for POX, POY, POP, SPOP |
Dsubx1(no whitening) |
|
|
RF PD Interface Board |
1U |
for POP_GR, POS_GR, POXVAC, POYVAC |
Dsubx1(no whitening) |
|
|
RF PD Interface Board |
1U |
for REFLVAC, POPVAC, ASVAC, (1ch left) |
Dsubx1(no whitening) |
|
|
BB PD Interface Board |
1U |
for PLLX, PLLY, (2ch left?) |
Dsubx1(no whitening) |
|
|
RF QPD Interface Board |
1U |
for REFL_A/B, POP_A/B |
Dsubx4(no whitening) |
|
|
RF QPD Interface Board |
1U |
for AS_A/B, ASVAC_A/B |
Dsubx4(no whitening) |
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RF QPD Interface Board |
1U |
for REFLVAC_A/B, POPVAC_A/B |
Dsubx4(no whitening) |
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f1 |
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RF Distribution Amplifier |
1U |
for f1. to Delay Line for CARM, POP LO, POX LO, POY LO, AS LO, REFLVAC LO, ASVAC LO, to RF Dist. |
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RF Distribution Amplifier |
1U |
for f1. to POPVAC LO, POXVAC LO, POYVAC LO, IQ Demod ASC x 3, to RF Dist. |
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RF Distribution Amplifier |
1U |
for f1. IQ Demod ASC x 7, to RF Dist. |
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RF Distribution Amplifier |
1U |
for f1. IQ Demod ASC x 2, (6ch left) |
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Delay Line Phase Shifter |
1U |
for REFL LO(f1, CARM), REFL LO(f2, CARM) |
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yes |
Common Mode Servo Board |
2U |
for CARM servo |
Dsubx3(no whitening) |
Dsubx1 |
yes |
Quad IQ Demodulator ASC |
1U |
for REFL_A QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for REFL_B QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for POP_A QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for POP_B QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for AS_A QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for AS_B QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for REFLVAC_A QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for REFLVAC_B QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for POPVAC_A QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for POPVAC_B QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for ASVAC_A QPD(f1) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for ASVAC_B QPD(f1) |
Dsubx2(whitening) |
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f2 |
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RF Distribution Amplifier |
1U |
for f2. to Delay Line for CARM, POP LO, POX LO, POY LO, REFLVAC LO, POPVAC LO, POXVAC LO, RF Dist. |
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RF Distribution Amplifier |
1U |
for f2. to POYVAC LO, RF Dist., (6ch left) |
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RF Distribution Amplifier |
1U |
for f2. IQ Demod ASC x 8 |
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Quad IQ Demodulator ASC |
1U |
for REFL_A QPD(f2) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for REFL_B QPD(f2) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for POP_A QPD(f2) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for POP_B QPD(f2) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for REFLVAC_A QPD(f2) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for REFLVAC_B QPD(f2) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for POPVAC_A QPD(f2) |
Dsubx2(whitening) |
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Quad IQ Demodulator ASC |
1U |
for POPVAC_B QPD(f2) |
Dsubx2(whitening) |
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2*f1,2*f2 |
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(RF splitter) |
- |
split 2*f1 into 2 for SPOP LO, SPOS LO |
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(RF splitter) |
- |
split 2*f2 into 2 for SPOP LO, SPOS LO |
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f3-f1,f3-f2 |
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fALSX,fALSY |
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(RF splitter) |
- |
split fALSX into 2 for POP EOM, Delay Line for ALSX |
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Delay Line Phase Shifter |
1U |
for POP_GR LO(ALSX), POS_GR LO(ALSY) |
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Common Mode Servo Board |
2U |
for ALSX servo |
Dsubx3(no whitening) |
Dsubx1 |
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(RF splitter) |
- |
split fALSY into 2 for POS EOM, Delay Line for ALSY |
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Common Mode Servo Board |
2U |
for ALSY servo |
Dsubx3(no whitening) |
Dsubx1 |
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Phase Frequency Discriminator |
1U |
for ALSX, ALSY |
?? |
?? |
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VCO with PLL |
2U |
for ALSX |
?? |
?? |
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VCO with PLL |
2U |
for ALSY |
?? |
?? |
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EX4 rack
Located close to EXC chamber. Takes care of PD/QPDs on TRX table. Also takes care of equivalent PD/QPDs in vacuum.
Name |
Height |
Description |
to ADC |
from DAC |
iKAGRA? |
PD/QPD |
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DC QPD Interface Board |
1U |
for TRX_A/B |
Dsubx2(whitened) |
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DC QPD Interface Board |
1U |
for TRX_GR_A/B |
Dsubx2(whitened) |
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DC QPD Amplifier |
1U |
for TRXVAC_A/B |
Dsubx2(whitening) |
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DC QPD Amplifier |
1U |
for TRXVAC_GR_A/B |
Dsubx2(whitening) |
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EY4 rack
Located close to EYC chamber. Components should be the same as those in EX4.
AS rack
Should be located close to OMM chamber. Takes care of PD/QPDs for OMC servo.
Name |
Height |
Description |
to ADC |
from DAC |
iKAGRA? |
PD/QPD |
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DC PD Amplifier |
- |
for OMCTVAC, (3ch left) |
Dsubx1(whitening) |
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DC QPD Interface Board |
1U |
for OMCT_A/B |
Dsubx2(whitened) |
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DC QPD Amplifier |
1U |
for OMCTVAC_A/B |
Dsubx2(whitening) |
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Others |
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OMC Servo board |
?? |
for OMC lock |
?? |
?? |
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Plan (as of 2012-08)
- Test fabrication of RF PD (by the end of September ?, test in October)
- Compile other analog circuit designs from LIGO into KAGRA spec. (by the end of October)
- Design frequency stabilization related circuits with NAOJ group (by the end of FY2012)