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Entry  Mon Aug 1 04:08:24 2011, kiwamu, Update, ABSL, Arm length measurement : cavity kick technique ETMY_kick.png
    Reply  Tue Aug 2 16:55:21 2011, rana, Update, ABSL, Arm length measurement : cavity kick technique L.png
Message ID: 5079     Entry time: Mon Aug 1 04:08:24 2011     Reply to this: 5095
Author: kiwamu 
Type: Update 
Category: ABSL 
Subject: Arm length measurement : cavity kick technique 

I made some attempts to measure the current length of the arm cavities by using the mass-kicking technique.

However unfortunately I am running out my energy to complete the measurement,

so I will finish the measurement at some time today.

I still have to set an appropriate kick amplitude. Right now I am injecting AWG into ETMY_LSC_EXC at 0.2 Hz with amplutde of 400 cnts.

I guess it needs a little bit more amplitude to get more psuedo-constant velocity.

Volunteers are always welcome !


(some notes)

The procedure was well-described in entry #555 by Dr.Stochino.

Here is just an example of the time series that I took today showing how the time series looks like.


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