Advanced Research Systems - 450K Cryostat Interface

DESCRIPTION

The 450 K Interface protects the cold end from excessive heat while experiments are carried out at elevated temperatures. The interface mounts between the cryostat cold end sample mount and the sample holder allowing compatibility in upgrading existing systems or for use with new systems. Heaters and temperature sensors are integrated together to provide accurate temperature monitoring and control to 450 K.

SPECIFICATIONS

Heater Input
12 W at 450K

Heater Impedance
36 ohms

Mechanical Loading
The interface will support a maximum of 1.0 Kg (2.2 lb) or a moment of 0.1 N-m (1.0 in-lb) applied at the sample mount thread.

Instrumentation
Calibrated sensors can be provided to cover the complete temerature range from the cryostat minimum temperature to 450K with accuracy of +/- 50mK. Contact ARS, Inc. for more information on instrumentation packages..

450K Iterface - Affect on Cold End Length

Closed cycle cold ends constructed for use with laboratory shrouds and radiation shields are normally supplied with a copper instrumentation tip, which can be removed and replaced by high temperature interfaces. Use the following table as a guidline. Contact ARS, Inc. for help in verifying dimensions.

Cryostat Type
DE-202 / DE-202N closed cycle	Replaces instrumentation tip - no change in overall length.
DE-202G closed cycle	Replaces instrumentation tip - no change in overall length.
DE-202B closed cycle	This cryostat has no instrumentation tip - add 1.44 inch (36.6 mm) to cryostat second stage length.
DE-204 / DE-204N closed cycle	Can replace 1.13 inch (28.7 mm) instrumentation tip. With no instrumentation tip, add 0.31 inch (7.9 mm) to second stage length. With instrumentation tip in place, add 1.44 inch (36.6 mm) to cryostat second stage length.
DE-204B closed cycle	This cryostat has no instrumentation tip - add 1.44 inch (36.6 mm) to cryostat second stage length.
LT-3-110 open cycle	Add 1.44 inch (36.6 mm) to minimum cryostat length - minimum length becomes 6.94 inch (176 mm).
LT-3B	Add 1.44 inch (36.6 mm) to minimum cryostat length - minimum length becomes 5.94 inch (151 mm). Requires 1.50 inch (38.1 mm) OD radiation shield.

450K Interface
	* see table below for affect on cold end length