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CRY (Cryostat EX)
nobuhiro.kimura - 16:39 Tuesday 18 August 2026 (37370) Print this report
Started heating the X-end cryo-duct shields

[Kimura and Yasui]

 We stopped the X-end cryo-duct shield cryo-coolers and started heating the cryo-duct shields.
 The cryo-duct shield cryo-coolers were stopped between 2:59 p.m. and 3:00 p.m.
Before stopping the cryo-coolers, we switched the vacuum exhaust pumps from the ion pumps to the turbo molecular pump.s
The switchover took place between 1:47 PM and 2:39 PM.

Comments to this report:
takashi.uchiyama - 17:35 Friday 21 August 2026 (37399) Print this report
Yasui, Uchiyama

We turned on the heaters of duct shield cryocoolers of EX at 17:40 on 21 August. The heater power is about 8W.

Fig. 1 shows current source for the heater of the Arm side cryocooler.
Fig. 2 shows current source for the heater of the BRT side cryocooler.
Images attached to this comment
takashi.uchiyama - 8:13 Monday 24 August 2026 (37402) Print this report

Temperature changes of the cryocoolers for the duct shield of EX.
Images attached to this comment
takashi.uchiyama - 9:32 Monday 24 August 2026 (37403) Print this report
2026/08/24
Uchiyama

I increased the heater power for the duct shields cryocoolers at EX from 8W to 18W.
Fig. 1 shows current source for the heater of the Arm side cryocooler.
Fig. 2 shows current source for the heater of the BRT side cryocooler.
Images attached to this comment
takashi.uchiyama - 12:24 Monday 24 August 2026 (37404) Print this report
2026/08/24
Yasui, Uchiyama

We turned on the heater on the EXC radiation shield at 12:20 on 24 August. The heater power was about 15W.


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takashi.uchiyama - 9:36 Tuesday 25 August 2026 (37410) Print this report
2026/08/25

Temperature changes of the cryocoolers for the duct shield of EX and IM of ETMX.
T0: 9:37JST on 25 August.
Images attached to this comment
takashi.uchiyama - 14:36 Tuesday 25 August 2026 (37412) Print this report
2026/08/25

Kimura, Uchiyama

Since the temperature of cryocoolers were over 280K, we reduce the heater power of the cryocoolers from 18W to 8W at 14:30.

Fig. 1 shows current source for the heater of the Arm side cryocooler.
Fig. 2 shows current source for the heater of the BRT side cryocooler.
Images attached to this comment
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