Center for Relativistic Laser Science

1. Equipment name

- Ultra low temperature refrigerator system using Helium mixtures (헬륨 혼합가스 극저온 냉동장치)

2. Manufacture and Model

- Leiden Cryogenics, 2015

- CF-81-700 Maglev

3. Purpose

- In order to select a proper detector module for AMoRE experiment, it need to have R&D process to test the detector performance, like energy calibration and signal response, etc, at the mK temperature. CUP utilized the dilution refrigerator for cooling-down the R&D setup to mK temperature.

4. Specification and performance :

- 1’st stage Cryogen free cooler

  . Pulse tube refrigerator (Cryomech PT415 with remote motor)

  . 45 W @ 40 K, 1.5 W @ 4.2 K

- Gas Handling system

  . Levitation type turbo pump, root pump,

  . Auto condensing/recovery system (include emergency recovery)

- Dilution unit

  . minimum temperature : less than 10 mK

  . Cooling power : 0.7 mW @ 120 mK

  . Experimental area : 408 (diameter) × 540 (height)

  . 36 hours cool-down time with nitrogen precooling (no extra load)

5. Location and Picture :

- One refrigerator is installed at YangYang underground laboratory and the other is operated at IBS head quarter (Low background high resolution lab)