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Horizontal cryostat for polarized proton targets; Cryostat horizontal pour cibles de protons polarises

Abstract

Continuously fed horizontal cryostat to be used for polarized proton targets; includes: 1 standard storage dewar commercially available; 2 shifting of dewar requiring 10 minutes, without any warming of the target; 3 no conventional nitrogen cooled shield but rather taking advantage of the cold helium vapours evaporated in the transfer line and/or the helium evaporated to cool the polarized crystal; 4 a heat exchanger which reduces by a factor of two the consumption of helium lowering in the same ratio the transfer line and/or the helium evaporated to cool the polarized crystal; 5 regulation of the temperature by means of a needle valve included in the superfluid helium line. This cryostat, used in conjunction with a 1000 l/s pump allows one to maintain at 1.06 deg. K a target, in which is dissipated 1 watt hyper frequency power, with an helium consumption of 40 litres/day (measured directly in the storage dewar). (author) [French] Description d'un cryostat horizontal, a alimentation continue, pour cible de protons polarises, presentant les caracteristiques suivantes: 1 utilisation de vases de stockage de modele commercial; 2 echange de vase en 10 minutes sans rechauffement; 3 absence d'azote liquide remplace par les vapeurs froides de l'helium evapore dans  More>>
Authors:
Roubeau, P M [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Publication Date:
Nov 15, 1966
Product Type:
Thesis/Dissertation
Report Number:
CEA-R-3172
Resource Relation:
Other Information: TH: These docteur-ingenieur
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CRYOSTATS; HYDROGEN 1 TARGET; POLARIZED PRODUCTS; POLARIZED TARGETS; PROTONS
OSTI ID:
20818102
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France); Faculte des Sciences de l'Universite de Grenoble - 38 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR05R3172118231
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
99 pages
Announcement Date:
Dec 30, 2006

Citation Formats

Roubeau, P M. Horizontal cryostat for polarized proton targets; Cryostat horizontal pour cibles de protons polarises. France: N. p., 1966. Web.
Roubeau, P M. Horizontal cryostat for polarized proton targets; Cryostat horizontal pour cibles de protons polarises. France.
Roubeau, P M. 1966. "Horizontal cryostat for polarized proton targets; Cryostat horizontal pour cibles de protons polarises." France.
@misc{etde_20818102,
title = {Horizontal cryostat for polarized proton targets; Cryostat horizontal pour cibles de protons polarises}
author = {Roubeau, P M}
abstractNote = {Continuously fed horizontal cryostat to be used for polarized proton targets; includes: 1 standard storage dewar commercially available; 2 shifting of dewar requiring 10 minutes, without any warming of the target; 3 no conventional nitrogen cooled shield but rather taking advantage of the cold helium vapours evaporated in the transfer line and/or the helium evaporated to cool the polarized crystal; 4 a heat exchanger which reduces by a factor of two the consumption of helium lowering in the same ratio the transfer line and/or the helium evaporated to cool the polarized crystal; 5 regulation of the temperature by means of a needle valve included in the superfluid helium line. This cryostat, used in conjunction with a 1000 l/s pump allows one to maintain at 1.06 deg. K a target, in which is dissipated 1 watt hyper frequency power, with an helium consumption of 40 litres/day (measured directly in the storage dewar). (author) [French] Description d'un cryostat horizontal, a alimentation continue, pour cible de protons polarises, presentant les caracteristiques suivantes: 1 utilisation de vases de stockage de modele commercial; 2 echange de vase en 10 minutes sans rechauffement; 3 absence d'azote liquide remplace par les vapeurs froides de l'helium evapore dans la canalisation de transfert et/ou les vapeurs de l'helium evapore pour refroidir le cristal polarise; 4 utilisation d'un echangeur qui aboutit a reduire de moitie la consommation d'helium, donc la pression d'evaporation, et qui permet, pour une pompe donnee, d'abaisser la temperature de fonctionnement de 0.1 degre environ; 5 reglage de la temperature au moyen d'une vanne a aiguille placee sur le circuit d'helium prerefroidi (superfluide). Ce cryostat, utilise avec une pompe de 1000 l/s permet de maintenir a une temperature de 1.06 deg. K une cible dans laquelle est dissipee une puissance d'hyperfrequence de 1 watt, moyennant une consommation d'helium de 40 litres/jour (mesuree dans le vase de stockage). (auteur)}
place = {France}
year = {1966}
month = {Nov}
}