Products for Research Inc.

Liquid Heat-Exchanged Multi-Stage Series

Thermoelectric Photomultiplier Tube Chambers

for Tubes of 2.56" (65 mm), and 2.1" (53.4 mm) or less Nominal Diameter

The liquid heat-exchanged Multi-Stage series includes the TE208RF (side on), TE209RF (65 mm, end on), TE210RF (end on), TE410RF (end on), and TE510RF (end on) thermoelectrically cooled photomultiplier tube chambers. These chambers utilize cascaded Peltier devices to achieve temperatures needed for superior detector performance, while maintaining the convenience of thermoelectric cooling. These PMT coolers are provided complete with magnetic, electrostatic and RFI shielding, a double pane evacuated window cell with the Products for Research no-dew apparatus to prevent formation of condensation in the light path, the low voltage DC power supply to drive the Peltier devices, and the appropriate PMT socket assembly. Digital PID Temperature Control is available as Option 36, and if included, changes the type numbers to TE208TSRF, TE209TSRF, TE210TSRF, TE410TSRF, and TE510TSRF respectively. Liquid heat-exchanged thermoelectrically cooled PMT housings typically use water, either by means of a recirculating liquid heat exchanger, or tap water flowing into an open drain to remove heat from the PMT cooler. Other non-hazardous liquids may also be used. Chambers in the Multi-Stage series have been designed to accept all interchangeable options and accessories used in conjunction with the standard line of cooled housings for 2.1 inch (53.4 mm) or less nominal diameter photomultipliers

Unit Type	Description	Performance
TE208RF	Standard multi-stage thermoelectric PMT chamber for 53.4 mm diameter side on PMT's Outline drawing (9K) and Specifications	T > 60°C, w/Liquid > 10°C Performance Graph (13K)
TE209RF	Standard multi-stage thermoelectric PMT chamber for 65 mm diameter end on PMT's Outline drawing (9K) and Specifications	T > 60°C, w/Liquid > 10°C Performance Graph (13K)
TE210RF	Standard multi-stage thermoelectric PMT chamber for 53.4 mm diameter end on PMT's Outline drawing (8K) and Specifications	T > 60°C, w/Liquid > 10°C Performance Graph (13K)
TE410RF	Economical multi-stage thermoelectric PMT chamber for 53.4 mm diameter end on PMT's Outline drawing (8K) and Specifications	T > 50°C, w/Liquid > 10°C Performance Graph (13K)
TE510RF	Enhanced multi-stage thermoelectric PMT chamber for 53.4 mm diameter end on PMT's Outline drawing (8K) and Specifications	T > 70°C, w/Liquid > 10°C Performance Graph (13K)