KAGRA Logbook

Reports 1-1 of 1

VIS (EX)

hiromi.yasui - 17:50 Monday 06 December 2021 (19098)

OFFLOAD of EX

With Ushiba-san,

I tried to offload EX.

1. I used the stepper motor of IP_L, T, Y so that the value of K1:VIS-ETMX_IP_BLEND_LVDTL_INMON, K1:VIS-ETMX_IP_BLEND_LVDTT_INMON, K1:VIS-ETMX_IP_BLEND_LVDTY_INMON would be 0 respectively.

2. I used F0, F1, F3, BF_GAS so that the value of K1:VIS-ETMX_F0_DAMP_GAS_INMON, K1:VIS-ETMX_F1_DAMP_GAS_INMON, K1:VIS-ETMX_F3_DAMP_GAS_INMON and K1:VIS-ETMX_BF_DAMP_INMON would be 0 respectively.

3. I used the F0Y stepper motor so that the value of K1:VIS-ETMX_BF_LVDTEUL_Y_INMON would be 0.

4. I used the F0Y stepper motor to keep the value of K1:VIS-ETMX_BF_LVDTEUL_Y_INMON 0, while I moved the BF pico motor so that the value of K1:VIS-ETMX_TM_OPLEV_TILT_HOR_OUT16 would be 0

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Comments to this report:

satoru.ikeda - 11:22 Wednesday 08 December 2021 (19126)

I checked the past movement amount and the movement direction of KeyStone.
I also used this information to adjust the orientation of the buttons in OFFLOAD_OVERVIEW.adl.

F0: + step > keyston position up, -51200step = -123.8um at VIS-ETMX_F0_LVDTINF_GAS_OUT16
=> about +30[um]/12800[cnt]
F1: + step > keyston position down, -32000step = +256.0um at VIS-ETMX_F1_LVDTINF_GAS_OUT16
=> about -100[um]/12800[cnt]
F2: Not used.(K-Log#17715)
F3: + step > keyston position down, +6400step = -78.0um at VIS-ETMX_F1_LVDTINF_GAS_OUT16
=> about -160[um]/12800[cnt]
BF: + step > keyston position down, -32000step = -251.0um at VIS-ETMX_BF_LVDTINF_GAS_OUT16
=> about -100[um]/12800[cnt].

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etmx_stepper_gas.txt