Electronics for BICEP

All cards: 2.5" x 4". Parts list Protel Cirexx



BICEP ZSPEC spare
PCBs fabricated Assembled @ South Pole

GRT
4 3 3 10 10 10
Level sensor
1 3 15 2 (+2 in progress) 4
FR driver
6 4 10 10 10
Heaters:
8 3 4 25 15 15
- 400 &Omega fridge
3 2 1 6 6
- 100k &Omega FP
1 1 2 2
- 1k &Omega Fridge Bracket
1 1 1 3 3
- 4k &Omega JFET Kickstart
3 1 4 4

	BICEP	ZSPEC	spare	PCBs fabricated	Assembled	@ South Pole
GRT	4	3	3	10	10	10
Level sensor	1		3	15	2 (+2 in progress)	4
FR driver	6		4	10	10	10
Heaters:	8	3	4	25	15	15
- 400 &Omega fridge	3	2	1		6	6
- 100k &Omega FP	1		1		2	2
- 1k &Omega Fridge Bracket	1	1	1		3	3
- 4k &Omega JFET Kickstart	3		1		4	4

Germanium / Cernox Resistance Thermometer readout (4)

UltraCooler:	UC evaporator #1 (G27070),	UC focal plane #1 (X30330 - ch1)
		UC evaporator #2 (X19402), 	UC focal plane #2 (X32726 - ch3)
		UC strap / fridge bracket (X29903 - ch4)
InterCooler:	IC evaporator    (X20063),	IC focal plane    (X31232 - ch2)

GRT.xls, temp_convert.c calibration curves

Liquid He level sensor (1)

Faraday polarization modulator driver (6), 4He/3He/3He sorption refrigerator Heaters (8)

400 &Omega  pumps[4He,IC3He,UC3He]/heatswitches[4He,IC3He] heater (3 BICEP)
100k &Omega Focal Plane heater (1) [UCstrap-ch1, IC-ch2]
1k &Omega Focal Plane Fridge Bracket heater (1) [fridge foot -ch4]
4k &Omega JFET Kickstart heater (3)