|
Size: 5371
Comment:
|
Size: 5375
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 57: | Line 57: |
| || || || | |||||| |
| Line 62: | Line 62: |
| || || || | |||||||| |
| Line 67: | Line 67: |
| || QPD Interface Board || 1U || || how many?? || | || QPD Interface Board || 1U || how many?? || |
| Line 79: | Line 79: |
| Located close to EYC chamber. Components should be the same as EX4. | Located close to EYC chamber. Components should be the same as those in EX4. |
Analog Electronics for Interferometer Control
Electronics
Name |
Height |
Schematics |
Power |
Description |
RF PD in air |
- |
+-18V |
has DC, RF HI, RF LOW outputs |
|
BB PD in air |
- |
|
|
broadband (for 2*f1, 2*f2 and nonresonant SB ?) |
RF QPD in air |
- |
|
|
should have 4 RF outputs, 4 DC outputs |
DC PD in air |
- |
|
|
should have DC output |
DC QPD in air |
- |
|
|
should have 4 DC outputs |
RF PD for green in air |
- |
|
|
BB can be OK |
DC PD for green in air |
- |
|
|
|
DC QPD for green in air |
- |
|
|
|
TTFSS |
- |
from Interface |
|
|
TTFSS Interface |
- |
+-17V,+-24V,+-200V |
|
|
PMC Servo Board |
- |
|
+-17V,+-24V,+-200V? |
may need interface board |
RF Oscillator Source |
? |
Agilent |
AC |
for the time being |
Frequency Doubler |
1U |
|
|
for sideband power monitor |
Difference Frequency Generator |
|
|
|
for nonresonant sidebands |
Phase Frequency Discriminator |
1U |
|
|
for ALS |
RF Distribution Amplifier |
1U |
|
+-17V,+-24V |
split into 8 |
Delay Line Phase Shifter |
1U |
|
+15V? |
1 input, 1 output? |
Quad IQ Demodulator LSC |
1U |
+-18V |
4 LOs for 4 demodulation channels |
|
Quad IQ Demodulator ASC |
1U |
+-18V |
1 LO for 4 demodulation channels |
|
Common Mode Servo Board |
1U |
|
+-17V,+-24V |
2 inputs, slow and fast outputs |
PD Interface Board |
1U |
|
+-18V |
for ribbon cables from RF PDs. 8 inputs? |
QPD Interface Board |
1U |
|
+-18V? |
for ribbon cables from RF QPDs. 8 inputs? |
ISS Board |
? |
|
|
|
PLL Servo Board |
? |
|
|
|
OMC Servo Board |
? |
|
|
|
References: awiki/RfDesign, awiki/LSC_Photodetectors
Photodetector list
List of the Interferometer Detection Ports JGW-T1402982
For each rack
KAGRA ISC Electrical Components Layout JGW-D1402986
IO rack
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, IMC TRANS, and IMMT2 tables.
Name |
Height |
Description |
|
RF Oscillator Source |
? |
for fIMC sideband (also for Refcav) |
|
RF Distribution Amplifier |
1U |
for fIMC. to PSL EOM, to Delay Line for Refcav, to Delay Line for IMC REFL x 3, (3ch left) |
|
Delay Line Phase Shifter |
1U |
for TTFSS LO (Refcav lock) |
|
Delay Line Phase Shifter |
1U |
for CM board LO (IMC LSC) |
|
Quad IQ Demodulator LSC |
1U |
for IMCR PD (fIMC), (3ch left). |
|
Common Mode Servo Board |
1U |
for IMC servo |
|
Quad IQ Demodulator ASC |
1U |
for IMCR_A QPD (fIMC) |
|
Quad IQ Demodulator ASC |
1U |
for IMCR_B QPD (fIMC) |
|
|
|
||
RF Oscillator Source |
? |
for f1 sideband |
|
RF Distribution Amplifier |
1U |
for f1. to PSL EOM, to LSC racks, to Frequency Doubler, to Differential Frequency Generator, (4ch left) |
|
Frequency Doubler |
1U |
f1 to 2*f1 for ISC racks |
|
Diff. Freq. Generator |
?? |
make f3-f1 for ISC racks |
|
RF Oscillator Source |
? |
for f2 sideband |
|
RF Distribution Amplifier |
1U |
for f2. to PSL EOM, to LSC racks, to Frequency Doubler, to Differential Frequency Generator, (4ch left) |
|
Frequency Doubler |
1U |
f1 to 2*f1 for ISC racks |
|
Diff. Freq. Generator |
?? |
make f3-f2 for ISC racks |
|
RF Oscillator Source |
? |
for fALSX sideband for ISC racks |
|
RF Oscillator Source |
? |
for fALSY sideband for ISC racks |
|
|
|
||
PD Interface Board |
1U |
how many?? |
|
QPD Interface Board |
1U |
how many?? |
|
|
|
||
ISS Board |
?? |
|
|
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.
EX4 rack
Located close to EXC chamber.
EY4 rack
Located close to EYC chamber. Components should be the same as those in EX4.
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)