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Table 2
Requirements and characteristics of the 4He-JT cooler.
| Working fluid ........................ | 4Helium |
| Heat lift at 17.5 K pre-cool temperature | |
| Maximum ........................... | 19.2 mW |
| Required ........................... | 13.3 mW |
| Pre-cool requirements | |
| Third V-groove ..................... | ≤ 54 K |
| Sorption cooler LVHX1 ............ | 17.5–19 K |
| Nominal operating temperature ......... | 4.5 K |
| Mass | |
| Compressors, pipes, cold stage ...... | 27.7 kg |
| Electronics and current regulator ...... | 8.6 kg |
| Power into current regulator ............ | ≤ 120 W |
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