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Entry  Fri Jul 29 14:27:43 2022, Stephen, DailyProgress, Cryo vacuum chamber, Progress - Heaters, RTDs, Maglite 
    Reply  Tue Aug 2 11:37:19 2022, Radhika, DailyProgress, Cryo vacuum chamber, Progress - Heaters, RTDs, Maglite IMG_3704.jpeg
       Reply  Fri Sep 9 12:10:29 2022, Radhika, DailyProgress, Cryo vacuum chamber, Progress - Heaters, RTDs, Maglite IMG_3745.PNG
          Reply  Fri Sep 16 16:29:28 2022, Radhika, DailyProgress, Cryo vacuum chamber, Progress - Heaters, RTDs, Maglite IMG_3756.jpegIMG_3759.jpeg
Message ID: 2802     Entry time: Fri Sep 16 16:29:28 2022     In reply to: 2801
Author: Radhika 
Type: DailyProgress 
Category: Cryo vacuum chamber 
Subject: Progress - Heaters, RTDs, Maglite 

I torqued down the toothed washer and bolt holding the ground wire to the Maglite body and locally flattened the aluminum, securing the electrical connection. With the Maglite wired up, I connected a Tenma power supply to a mini breadboard and attached the Maglite leads [Attachment 1]. At 3V, 0.38A flowed through the incandescent bulb [Attachment 2].

Next steps:

- I will wire a current-limiting circuit to protect the bulb.

- Normally the Maglite batteries press up against an internal component to complete the flashlight circuit. Since we’ve cut off the body and of course have no batteries, I plan to use vacuum/cryo-safe epoxy to hold it in place (or use some spring mechanism to apply pressure to that component).

- The head of bolt used to connect the ground wire to the aluminum body sticks out and interferes with screwing on the flashlight's reflector. I will need to cut away some of the metal to allow the piece to screw in all the way.

Once these steps are complete, we need to address the feedthrough for the maglite leads into Megastat. Then it will be ready to be mounted inside the chamber and used for wafer heat actuation.

Attachment 1: IMG_3756.jpeg  55 kB  Uploaded Mon Sep 19 14:25:13 2022  | Hide | Hide all
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Attachment 2: IMG_3759.jpeg  117 kB  Uploaded Mon Sep 19 14:25:19 2022  | Hide | Hide all
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