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fabian.arellano - 16:05 Monday 25 January 2021 (15816) Print this report
Temperature during O3GK.

I haven't seen a report about the temperature around the vacuum chambers during O3GK, so I took a look to the data and post it here.

O3GK happened from April 7, 8:00 UTC to April 21, 0:00 UTC 2020.

Temperatures are within ±0.1 °C.

Suspension

Temperature (°C)

BS

23.0

SR2

23.5

SR3

23.0

SRM

22.9

PR2

23.2

PR3

23.2

PRM

23.5

See pictures attached.

Images attached to this report
Comments to this report:
shinji.miyoki - 10:09 Tuesday 26 January 2021 (15825) Print this report

The target temperatures for each area and positions  are those during O3GK in basic.

However, EXV area temp (~24.5C) during O3GK seemed to be high because of FFUs operations, At present it is ~ 21.6C because of a cooler that is operated at low wind cooling mode.

So we need to find optimum temperature for EXV.  

shinji.miyoki - 10:18 Tuesday 26 January 2021 (15826) Print this report

The target temperatures for each area and positions  are those during O3GK in basic.

So,

15637 and 15816

 

However, EXV area temp (~24.5C) during O3GK seemed to be high because of FFUs operations in addition to its originally higher temp than other area.

At present it is ~ 21.6C because of a cooler that is operated at low wind cooling mode.

 

So we need to find optimum temperature for EXV.  

 

If we found some difficulties about temperature balance all over the center area, we should reconsider the target temperatures.

shinji.miyoki - 15:21 Tuesday 26 January 2021 (15828) Print this report

I turned on  a Delongi heater near SR3 (level 4) and a dehumidifier in front of SR-C cooler. around 13:30.

I will monitor the temp around SR3.

takaaki.yokozawa - 10:21 Wednesday 27 January 2021 (15838) Print this report

I placed two mini heaters on the 2nd floor between SR3 and SRM

shinji.miyoki - 16:26 Wednesday 27 January 2021 (15843) Print this report

SR3 temperature is 22.7C around 16:00 and it increased rapidly with these "loca"l heaters near SR3 and SRM.

So I decreased the heating level for 4 (1.5kW)  to 1 (~600W) of the delongi heater near BS-C cooler no to let them be too high within several hours.

shinji.miyoki - 20:28 Wednesday 27 January 2021 (15846) Print this report

I leveled up from 1 to 5 again for the delongi heater to speed up the temperature enhancement for SR3.

shinji.miyoki - 20:55 Thursday 28 January 2021 (15859) Print this report

I added a 500W heater beside the lid of SR2 (+ x side) on the 2F in the BS area.

In addition to this, two delongi heaters around BS  were turned on and I set level 3 ( ~ 900W) heating power around 10:00.

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