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Experimental Study on Scaling Law of Outgassing Rate with A Pumping Parameter
http://hdl.handle.net/10655/2810
http://hdl.handle.net/10655/2810cb056325-dc3a-4fa4-bde8-2ac364484f54
Item type | 研究報告書 / Research Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Experimental Study on Scaling Law of Outgassing Rate with A Pumping Parameter | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | outgassing rate | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | ultimate pressure | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | pumping parameter | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | LHD | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
"Akaishi, K.
× "Akaishi, K.× Kubota, Y.× Ezaki, K.× Motojima, O." |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "The outgassing rate of a small test chamber made of 304 type stainless steel has been measured as a function of pumping speed in a range from 0.3 to 200 l/s. In the experiment the chamber has been first exposed to the air and then pumped with different pumping speeds for 3 days at room temperature of 20 degrees C without baking. The typical outgassing rates of the chamber are determined from the measurement of steady pressures at the pumping time of 72 h. As a result of experiment, it is found that measured outgassing rates q obey a set of power laws of q_1=c_1 (S/A)^m1 and q_2=c_2 (S/A)^m2 were S/A is the ratio of pumping speed S to surface area A of the chamber, c_1 and c_2 are constants, exponents of m_1 and m_2 are 0.8282 for S/A geq 10^-3l/s cm^2, and 0.4655 for S/A leq 10^-3 l/scm^2, respectively. Technical application of the obtained scaling law is discussed in connection with the design of pumping system for a large vacuum device." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 1994-08-01 |
|||||
報告書番号 | ||||||
NIFS-294 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |