Thales Cryogenics - Pulse-Tube Coolers

Products
Pulse-Tube Coolers

For applications where a long lifetime is required and where mechanical noise of the cold finger may interfere with the application, a pulse tube cryocooler will be the appropriate choice.

Having no moving parts in the cold, the pulse tube cold finger has a very low vibration and magnetic noise. Combined with a flexure compressor from the LSF range, the pulse tube cooler has no wearing parts and therefore offers an extremely long lifetime.

Introduction

The LPT 9310 (LPT=Linear Pulse Tube) pulse tube cryocooler is specially developed for applications where the object to be cooled is extremely sensitive to vibrations. The absence of moving parts in the pulse tube cold head diminishes the influence of most of the disturbances at the cooler-detector interface. The pulse tube cryocooler produces and sustains a detector operating temperature of 80 K.

The combination of a cold head with no moving parts and the reliable moving magnet flexure bearing compressor guarantees the high reliability of this cooler type.

With its specific characteristics, the LPT 9310 pulse tube cryocooler is very suitable for applications requiring extremely low levels of induced vibration, acoustic noise, and electromagnetic interference.

Comparable in layout to the "split" configuration Stirling-cycle coolers, the pulse tube cryocooler is a sealed device, with the compressor and cold finger constructed as separate components and connected by a malleable metal transfer line. This configuration enhances the flexibility in system design and helps to isolate the sensitive detector even more from compressor-induced vibration or EMI.

Design Features

dual opposed pistons driven by linear motors minimise compressor vibration and acoustic noise
compact magnetic circuit optimised for motor efficiency and reduction of electromagnetic interference (EMI).
pulse tube cold head with no moving parts suitable to directly mount highly sensitive detectors.
moving magnet flexure bearing design eliminates possible causes of performance degradation.
no maintenance is required.
closed loop control of detector temperature and cold production is possible.

Specifications

Pulse-Tube CryoCoolers
Parameter	LPT 9310	LPT 9510
ø Coldfinger Approx. Dewar Bore	24 mm	17 mm
Dimensions Compressor (ø x L)	90x204 mm	60x122 mm
Cooling Power @ 80 K; 23 °C	4000 mW	1000 mw
Input Power	150 W	60 W
MTTF	20000 hour	20000 hour
Mass	10 kg	2.5 kg
Operating Temperature	-20 to +51 °C	-20 to +51 °C
Suitable Drive Electronics	UA 7070 UA 8070	UA 7072 UA 8070
Datasheet Available