Todo list for PR maintenance

[YoshinoriFujii]

For PRs

Background

PR2

• BF-LVDT-V2 is off from the MEDM.

PR3

• BF-GAS has small clearance.

PRM

• TM actuation is not available.

:bulb: Todo

Item	PRM	PR2	PR3		reference
Open hatch	Feb. 28th done	---	Feb. 28th done
visual inspection: mechanically touching?	Yes, at TM-stage	---	yes, at BF-GAS. and released.
IM-OSEM position tuning		---	(*1)
get the position when the large offset was applied, from IOO member		---	---
visual inspection: mechanically touching? iteration-2	(*2)	---	(*1)
release bread board		---
replace the LVDT board and copy the tuned parameters	---		---
Measure all the sensor spectra and check if they are reasonable, no-friction, no-touching etc.					mode list
Measure all the measurable transfer functions and compare them with simulation					p.108-111 in ref1
check: FR range with GAS-LVDT	BF: from to / SF: from to	BF: from to / SF: from to	BF: from to / SF: from to

(1) This necessity is to be determined by measured transfer functions. (2) check the both cases

In addition,

PR2

• [X] check BF-LVDT-V2 condition?

  PR3

• [X] replace the HPCD and the satellite box

[YoshinoriFujii]

PR3 replace the HPCD and the satellite box

It seemed that this was caused by a shorted circuit of HPCD. see klog#8290

[YoshinoriFujii]

PR2 check BF-LVDT-V2 condition?

It was found that the channel of the LVDT board seemed dead. see klog#8253