Coolstar Coldheads
 |
 |
 |
 |
 |
|
Coolstar 0/12 |
Coolstar 0/40 |
Coolstar 2/9 |
Coolstar 6/30 |
Nominal cooling power at 20K (W) |
||||
| Normal speed (50 Hz) 72 rpm |
– |
– |
2.0 |
6.0 |
| Normal speed (60 Hz) 72 rpm |
– |
– |
2.1 |
6.5 |
| Boost speed 90 rpm |
– |
– |
2.4 |
7.0 |
| Standby speed 45 rpm |
– |
– |
1.1 |
4.0 |
Nominal cooling power at 77K (W) |
||||
| Normal speed (50 Hz) 72 rpm |
12.0 |
42.0 |
8.5 |
26.0 |
| Normal speed (60 Hz) 72 rpm |
14.5 |
50.0 |
9.5 |
28.0 |
| Boost speed 90 rpm |
17.0 |
57.0 |
11.0 |
30.0 |
| Standby speed 45 r pm |
8.0 |
27.0 |
6.2 |
17.0 |
| Crossover (mbar l at 20K) |
75 |
120 |
220 |
500 |
| Time to cooldown bare cold head (min) |
||||
| to 20K |
– |
– |
<16 |
<18 |
| to 77K |
<11 |
<11 |
– |
– |
| Increase in cooldown time for each 100g added mass (min) |
||||
|
|
6 |
2 |
14 |
5.2 |
| Base temperature (K) |
|
|
|
|
| Normal speed |
26 |
22 |
9.0 |
9.0 |
| Boost speed |
25 |
18 |
8.5 |
8.5 |
| Service intervals (hours) |
>15,000 |
>15,000 |
>15,000 |
>15,000 |
| Weight (kg) |
2.4 |
5.6 |
2.5 |
6.1 |
