کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1507957 993942 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Porous plug and superfluid helium film flow suppressor for the soft X-ray spectrometer onboard Astro-H
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Porous plug and superfluid helium film flow suppressor for the soft X-ray spectrometer onboard Astro-H
چکیده انگلیسی

Suppression of superfluid helium flow is critical for the Soft X-ray Spectrometer (SXS) onboard Astro-H, to achieve a life time of the liquid helium over 5 years. The superfluid film flow must be sufficiently small, compared to a nominal helium gas flow rate of the SXS (25μg/s). For this purpose, four devices composed of a porous plug, an orifice, a heat exchanger, and knife edge devices will be employed based on the experience of the X-ray microcalorimeter (XRS for X-Ray Spectrometer) onboard Suzaku. The porous plug is a phase separator of the liquid and gas helium. A potential film flow leaking from the porous plug is suppressed by the orifice. Almost all the remaining film flow evaporates at the heat exchanger. The knife edge devices stop the remaining film flow by using atomically sharp edges. In this paper, we describe the principle and design of these four devices.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cryogenics - Volume 50, Issue 9, September 2010, Pages 507–511
نویسندگان
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