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Entry  Mon Sep 27 00:33:50 2010, rana, Update, PSL, High Voltage Driver added to TTFSS -> NPRO 
    Reply  Fri Oct 1 21:34:14 2010, rana, tara, Update, PSL, High Voltage Driver added to TTFSS -> NPRO NPROTF.png2010_10_01.png
       Reply  Mon Oct 4 06:47:46 2010, rana, tara, Update, PSL, High Voltage Driver added to TTFSS -> NPRO 
Message ID: 3610     Entry time: Mon Sep 27 00:33:50 2010     Reply to this: 3640
Author: rana 
Type: Update 
Category: PSL 
Subject: High Voltage Driver added to TTFSS -> NPRO 

We added the Thorlabs HV Driver in between the FSS and the NPRO today. The FSS is locking with it, but we haven't taken any loop gain measurements.

This box takes 0-10 V and puts out 0-150 V. I set up the FSS SLOW loop so that it now servos the output of FAST ot be at +5V instead of 0V. This is an OK

temporary solution. In the future, we should add an offset into the output of the FSS board so that the natural output is 0-10 V.

I am suspicious that the Thorlabs box has not got enough zip to give us a nice crossover and so we should make sure to measure its frequency response with a capacitive load.

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