User`s manual

Lake Shore MTD Series Cryotest System User’s Manual
Model MTD-260 Cryotest Workstation H-1
APPENDIX H
Model MTD-260B Cryotest Workstation
H1.0 GENERAL
This appendix provides information on the Model MTD-260B Closed-Cycle 20 K Cryotest Workstation
with a closed-cycle refrigerator. The Model MTD-260B is used for testing focal plane arrays and
integrated circuits from <20 K to 350 K without the use of cryogens. The user area is identical to the
Model MTD-150B described in the main portion of this manual.
H2.0 DESCRIPTION
The MTD-260B is a user-configurable, single-test-position, closed-cycle Modular Test Dewar (MTD)
system for testing infrared focal plane arrays or integrated circuits at temperatures from <20 K to
350 K. The installation of a Test Set Assembly Kit completes the workstation setup configuration. The
user can quickly reconfigure the system for testing devices with different style packages by simply
interchanging device Test Set Assembly Kits. The standard system configuration includes an optical
window port over the interior device test location.
Eight- or sixteen-position filter/aperture wheels and calibrated blackbody/chopper assemblies can be
added to enhance the optical test capability of the system. The MTD-260B features a closed-cycle,
helium refrigeration system for cryogenic cooling. The cryotest dewar mainframe can be operated in
any orientation.
The following are typical features of the Model MTD-260B Cryotest Workstation:
• Modular design accommodates virtually any device package.
• Fast sample turnaround time.
• High signal quality.
• Superior optical performance
• Precise monitoring and control of temperature.
• Superior vacuum characteristics.
• Utilizes proven refrigerator design. The need for cryogens is completely eliminated.
• The refrigerator can be operated intermittently or continuously for 10,000 hours without
maintenance.
• Higher device test throughput with shortened warm-up and cool-down cycles.
The MTD-260B System utilizes most of the options and accessories available for the Lake Shore
Model MTD-150 continuous flow cryotest system. Please refer to Chapter 6 of this manual.
Please refer to the separate manufacturer’s manual for information on operation of the closed cycle
refrigerator.