Deuterium pumping experiment with superpermeable Nb membrane in JFT-2M tokamak

被引：16

作者：

Nakamura, Y ^{[1
]}

Sengoku, S

Nakahara, Y

Suzuki, N

Suzuki, H

Ohyabu, N

Busnyuk, A

Notkin, M

Livshits, A

机构：

[1] Natl Inst Fus Sci, Toki 5095292, Japan

[2] Japan Atom Energy Res Inst, Tokai, Ibaraki 31911, Japan

[3] Bonch Bruyevich Univ, St Petersburg 191186, Russia

来源：

JOURNAL OF NUCLEAR MATERIALS | 2000年 / 278卷 / 2-3期

关键词：

D O I：

10.1016/S0022-3115(99)00243-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new divertor pumping system with superpermeable membranes has been installed in the JFT-2M tokamak to investigate the applicability of membrane pumping to fusion devices. The membrane pumping is based on suprathermal (>1 eV) hydrogen permeation through a niobium membrane. Deuterium pumping is observed with divertor plasmas in tokamak environment. The pumping flux through the membrane increases by NBI heating and additional gas puffing and it is found that the pumping flux is directly proportional to the pressure in the divertor chamber where the pumping system is placed. The maximum permeation flux density is 7.3 x 10(19) D/m(2) s for a tokamak discharge with a dense and cold divertor plasma. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：312 / 319

页数：8

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