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Entry  Tue Jun 14 18:45:43 2022, Anchal, Update, SUS, LO2 lower magnets are stuck in coil, won't come off 
    Reply  Tue Jun 14 19:34:06 2022, yuta, Update, SUS, Resonant frequency identification from the free swing test 7x
       Reply  Thu Jun 16 18:30:07 2022, Anchal, Update, SUS, New diagonalized input matrices applied SUSInpMatDiag_MC1_MC2_MC3_BS_IMTX_ETMX_ETMY_AS1_AS4_SR2_PR2_PR3.pdf
          Reply  Tue Jun 21 08:36:50 2022, Anchal, Update, SUS, Diagonalized input matrices for LO1, freeSwing on ITMY and ITMX SUSInpMatDiag_LO1.pdf
    Reply  Wed Jun 15 15:07:07 2022, Koji, Update, SUS, LO2 SUS stuck fixed Screenshot_2022-06-15_15-00-22.pngScreenshot_2022-06-15_15-00-40.png
Message ID: 16913     Entry time: Tue Jun 14 18:45:43 2022     Reply to this: 16914   16918
Author: Anchal 
Type: Update 
Category: SUS 
Subject: LO2 lower magnets are stuck in coil, won't come off 

[Anchal, Yuta]

In the weekend, I ran a free swing test on all optics. During this test, LO2 magnets got stuck to the coil because LO2 PIT alignment was very high, making its lower OSEMs almost fully dark and upper OSEMs almost fully bright. Today we realized that LO2 is actually stuck and is not coming off even when we dither PIT alignment. We tried several ways but could not get this off. sad

Do we have any other method to get magnets off in vaccum?

It will be pretty bad if we try anything related to BHD with LO beam reflecting off a stuck mirror. Does anyone have any suggestions other than venting and fixing the issue?

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