= KAGRA VIS Operations Manual - SRM Suspension Data Reference =
<<Anchor(lvdt)>>

== LVDT Info ==
<<Anchor(lvdtcoil)>>

=== LVDT Coil Info ===
'''Copied from BS - check!'''
||Type ||Primary/Single/IN/1-6 ||Secondary/Double/OUT/2-7 ||Actuation/ACT/3-8 ||
||GAS Vertical ||AWG36, 187Ω, 38 mH ||AWG32, 78Ω, 9.5 mH ||AWG32, 110Ω, 74 mH ||
||PI Horizontal ||250 Ω ||320 Ω ||155 Ω ||




=== LVDT Coil Info ===
<<Anchor(lvdtdriver)>>

=== LVDT Driver Info ===
Original box for SRM:
||LVDT Driver S.N. ||Left card ||Stage ||Resistor value [ohm] ||Reference Signal ||Gain ||Right card ||Stage ||Resistor value [ohm] ||Reference Signal ||Gain ||
||<style="text-align:center" |4>SRM: SN 1807786 ||R0 ||BF GAS ||60.6 ||5.04 Vpp ||5.04/5.04 = 1.0 ||R0 ||PI LVDT#1 ||50.0 ||5.0 Vpp ||5.0/5.04 = 0.992 ||
||R1 ||SF GAS ||60.1 ||4.96 Vpp ||4.96/5.04 = 0.984 ||R1 ||PI LVDT#2 ||50.0 ||4.92 Vpp ||4.92/5.04 = 0.976 ||
||R2 ||F0 GAS ||60.7 ||4.96 Vpp ||4.96/5.04 = 0.984 ||R2 ||PI LVDT#3 ||50.5 ||4. Vpp ||5.0/5.04 = 0.992 ||
||R3 ||Not used ||61.2 ||4.94 Vpp ||4.94/5.04 = 0.98 ||R3 ||Not used ||50.8 ||4. Vpp ||4.9/5.04 = 0.972 ||




New box for SRM. Adjusting the potentiometers to have the same values:
||LVDT Driver S.N. ||Left card ||Stage ||Resistor value [ohm] ||Reference Signal ||Gain ||Right card ||Stage ||Resistor value [ohm] ||Reference Signal ||Gain ||
||<style="text-align:center" |4>SRM: SN 1403020 ||R0 ||BF GAS ||60.2 ||- Vpp ||- = - ||R0 ||PI LVDT#1 ||50.4 ||- Vpp ||- = - ||
||R1 ||SF GAS ||60.1 ||- Vpp ||- = - ||R1 ||PI LVDT#2 ||50.3 ||- Vpp ||- = - ||
||R2 ||F0 GAS ||60.7 ||- Vpp ||- = - ||R2 ||PI LVDT#3 ||50.3 ||- Vpp ||- = - ||
||R3 ||Not used ||61.0 ||- Vpp ||- = - ||R3 ||Not used ||50.2 ||- Vpp ||- = - ||




<<Anchor(filter)>>

== Filter Info ==
||Stage ||f (Hz) ||klog ||m (kg) ||klog ||k (N/m) ||klog ||kFR (N/m) ||klog ||
||F0 ||0.56 ||6886 || || || || || || ||
||SF ||0.38 ||6886 || || || || || || ||
||BF ||0.45 ||6886 || || || || || || ||


GAS filters suitable positions

||<tablewidth="765px" tableheight="151px">Filter||'''LVDT readout (µm)'''||'''klog'''||'''Notes'''||
||F0||-1600||[[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7740|7740]]||I couldn't find a klog. I wrote it in the notebook. I'll write a klog.||
||F1||0|| || ||
||BF||0|| ||We require the IM-V OSEM flags to be at the correct position.||

== Optimum Temperature ==
See klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7420|7420]].