Products > Test Dewars

J.K. Henriksen & Associates designs and manufactures the highest quality, best performing cryogenic test dewars available. Test dewars are typically classified by the mechanism used to provide cooling to the device under test (DUT):

• Pour-fill - characterized by an internal cryogen storage tank that provides cooling.
• Cryostat - an open-cycle heat exchanger fed by a large storage dewar of cryogen through a vacuum jacketed transfer line.
• Closed-cycle - a compressor based refrigeration system that requires no cryogen to achieve DUT temperatures below 10°K (two-stage) or below 40°K (single-stage).

Some of the common features found on J. K. Henriksen & Associates dewars:

• Plug-And-Play - modular design motherboard / daughterboard arrangement - allows operator to quickly and easily reconfigure a system for use with different device packages (i.e. 68-, 84-, 100-pin LCC, etc.) Custom packages available.
• Micro-coax Signal Lines - high-quality matched signal lines; 50-ohm impedance, bandwidths to 100MHz. Allows for high-speed signal transmission with minimal noise and crosstalk.
• Capacitance per lead: 15-20pF
• Gold-plated contacts
• Equivalent input noise is approximately 8 x 10 ^-15 amps/Hz
• Cross-talk < 0.1% at 1MHz with adjacent lead terminated.
• Fast Turnaround Time - rapid cool-down, warm-up and easy access to device space make for very rapid cycle times.
• Superior Optical Performance
• Low background units levels to 10 electrons / second.
• Precise Temperature Control - typical stability 0.05K or better--below 0.001K possible.
• Superior Vacuum Characteristics - translates into longer operation between pump-downs.

CLICK ON SYSTEM NUMBER FOR MORE INFORMATION:

MODEL	CTS-1250 CTS-1260	CTS-1360	CTS-1400	CTS-1550	CTS-1650	CTS-2500	CTS-8000
COOLING	LN2 Pour-Fill	LHe/LN2 Cryostat Single Stage	LN2 Pour-Fill	LHe/LN2 Cryostat Dual Stage	LHe/LN2 Cryostat Dual Stage	Closed-Cycle	LHe/LN2 Cryostat Single Stage
NUMBER OF DUT POSITIONS	1	1	1	1	1	1	8
COOL DOWN TIME	20 min. after top-off	to 80K 15 min. with LN2 to 20K 20 min.  with LHe	30 min. after top-off	to 5K 45 min. with LHe	to 5K 60 min. with LHe	to 20K 2.3 hours	to 80K >4 hours with LN2
WARM UP TIME	20 min. to 300K	20 min. to 300K	>30 min. to 300K	<60 min. from 4K	>60 min. from 4K	>120 min. from 10K	>120 min. from 77K
OPERATING TEMPERATURE	77K	<20K-300K using LHe 77K-300K using LN2	77K	4K-300K using LHe 77K-300K using LN2	4K-300K using LHe 77K-300K using LN2	<10K-300K <5K-300K	<20K-300K using LHe 80K-300K using LN2
USEFUL TEMPERATURE RANGE	77K-300K* (using vari-temp pedestal)	<6K-300K	77K-300K* (using vari-temp pedestal)	4K-300K using LHe	4K-300K using LHe	<10K-300K	<20K-300K using LHe 80K-300K using LN2
TEMPERATURE STABILITY	+/-0.05K or better	+/-0.05K or better	+/-0.05K or better	+/-0.05K or better	+/-0.05K or better	+/-0.05K or better	+/-0.05K or better
TEMPERATURE ACCURACY	+/-0.5K or better	+/-0.5K or better	+/-0.5K or better	+/-0.5K or better	+/-0.5K or better	+/-0.5K or better	+/-0.5K or better
HOLD TIME	16 hours	N/A	8 hours	N/A	N/A	N/A	N/A
SIZE	7" dia. x 10" long	7" dia. x 11.5" long	10" dia. x 18" long	10" dia. x 18" long	12" dia. x 18" long	10" dia. x 23" long	16" dia. x 18" long
WEIGHT	6.8kg (15 lbs)	10kg (22 lbs)	14.5kg (32 lbs)	13.2kg (29 lbs)	15.5kg (34 lbs)	24.5kg (54 lbs)	46kg (100 lbs)
REQUIRED ACCESSORIES (see below)	1*	1, 2, 3, 4	1*	1, 2, 3, 4	1, 2, 3, 4	1, 4	2, 3, 4
*  If variable temperature kit is installed, a temperature controller (item 4) will be required. ** Erbium3-Nickel displacer Accessories Test Set Assembly Kit - includes fan-out card, cold pedestal & device clamp Transfer Line Storage Dewar Temperature Controller
home | products | applications | customers | contact & info | links