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Cryogenic setup for MJ class laser targets

Published online by Cambridge University Press:  07 March 2019

A. S. Rybakov ,
E. I. Demikhov ,
E. A. Kostrov ,
V. S. Litvin ,
N. M. Sobolevsky ,
L. N. Latysheva  and
N. G. Borisenko
A. S. Rybakov
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Prospekt, Moscow 119991, Russia
E. I. Demikhov
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Prospekt, Moscow 119991, Russia
E. A. Kostrov
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Prospekt, Moscow 119991, Russia
V. S. Litvin
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Prospekt, Moscow 119991, Russia Institute for Nuclear Research of the Russian Academy of Sciences, 60-letiya Oktyabrya prospekt 7a, Moscow 117312, Russia
N. M. Sobolevsky
Affiliation:
Institute for Nuclear Research of the Russian Academy of Sciences, 60-letiya Oktyabrya prospekt 7a, Moscow 117312, Russia
L. N. Latysheva
Affiliation:
Institute for Nuclear Research of the Russian Academy of Sciences, 60-letiya Oktyabrya prospekt 7a, Moscow 117312, Russia
N. G. Borisenko*
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Prospekt, Moscow 119991, Russia
*
Author for correspondence: N. G. Borisenko, P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Prospekt, Moscow 119991, Russia. E-mail: ngbor@lebedev.ru
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Abstract

The cryogenic system for maintaining a target at a constant temperature in the range 5–25 K after shutting off the pulse tube (PT) cryogenic refrigerator is developed and tested. The temperature stability at the sample is ±2 mK for at least 20 hours. The cryogenic setup consists of cryostat, PT cryocooler, liquid helium vessel, helium gas supply, thermo-radiation shield, thermal resistance. The system provides 0.25 W of cooling power at the target. The appropriate thermal resistance should be used for different temperatures. The designed operation mode is 3 minutes off and 15 minutes on. The deactivation of PT cryocooler allows to achieve the target position stability of 1 micrometer or less during the X-ray characterization. The effect of neutron-shield was estimated using Monte-Carlo simulation.

Keywords

Cryogenic targetlaser focusmK temperature stabilityneutron shieldsub-micron vibrations
Type
Research Article
Information
Laser and Particle Beams , Volume 37 , Issue 1 , March 2019 , pp. 25 - 29
Copyright
Copyright © Cambridge University Press 2019 

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