Description: Cryogenic target with very thin "gold finger" heat pipe

This title appears in the Scientific Report : 2006

Cryogenic target with very thin "gold finger" heat pipe

An extremely light stainless steel heat pipe of 0.1 mm wall thickness and 5 mm diameter has been developed to transport heat from the liquid hydrogen/deuterium target to the cooling machine. As a further improvement an important reduction of the heat load to the cold parts of the system is achieved...

Personal Name(s):	Abdel-Samad, S.
	Abdel-Bary, M. / Kilian, K. / Ritman, J.
Contributing Institute:	Institut 1 (Experimentelle Kernphysik I); IKP-E-I
Published in:	Nuclear instruments & methods in physics research / A, 556 (2006) S. 20 - 23
Imprint:	Amsterdam North-Holland Publ. Co. 2006
Physical Description:	20 - 23
DOI:	10.1016/j.nima.2005.10.023
Document Type:	Journal Article
Research Program:	Physik der Hadronen und Kerne
Series Title:	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 556
Subject (ZB):	hydrogen: target target cryogenic heat pipe
	Publikationsportal JuSER

Please use the identifier: http://dx.doi.org/10.1016/j.nima.2005.10.023 in citations.

An extremely light stainless steel heat pipe of 0.1 mm wall thickness and 5 mm diameter has been developed to transport heat from the liquid hydrogen/deuterium target to the cooling machine. As a further improvement an important reduction of the heat load to the cold parts of the system is achieved by coating the heat pipe and the target finger with a thin polished gold layer. This brings the radiation heat load from 1400 mW on the non-isolated stainless steel surface system down to 70 mW on the gold-coated system. A further reduction to 0.05 mW is achieved by using an aluminum heat shield at 50 K around the cold parts at 15 K. Finally, the heat load was further reduced by a factor 11, without changing the geometry, by coating both sides of the aluminum shield with a thin gold mirror layer. This new, very slim "gold finger" target system shows safe and stable performance even with a low power-cooling machine. (c) 2005 Elsevier B.V. All rights reserved.