TY - GEN
T1 - Development of a photocathode test bench using a CRYO-pump and a neg pump
AU - Kubo, D.
AU - Kuriki, M.
AU - Iijima, H.
AU - Ito, K.
AU - Shonaka, C.
AU - Masumoto, Y.
AU - Nishimori, Nobuyuki
AU - Yamamoto, M.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - The Beam Physics Laboratory of Hiroshima University studys photo-cathode for future acceleators by using a photo-cathode test bench. It aims to develop a cathode with the higher quantum efficiency and longer-lifetime. GaAs with Negative Electron Affinity (NEA) surface is one of the best cathode among the advanced cathode matrials. The NEA surface is essential to activate it as an electron source. It is well known that the NEA GaAs photo-cathode needs extremely high vacuum, because it is easily damaged. To study the detail process of the cathode property degradation by the damage, we construct a photo-cathode test bench with an extremely high vacuum quality based on a cryo-pump (2700l/s) and a NEG pump (1900l/s). The vacuum chamber is made of titanium (TP340) for low outgassing rate. We alredy obtain 1.7E-9Pa only with the cryo-pump. In this article, the test bench is briefly explained and the results of the first vacuum test is presented.
AB - The Beam Physics Laboratory of Hiroshima University studys photo-cathode for future acceleators by using a photo-cathode test bench. It aims to develop a cathode with the higher quantum efficiency and longer-lifetime. GaAs with Negative Electron Affinity (NEA) surface is one of the best cathode among the advanced cathode matrials. The NEA surface is essential to activate it as an electron source. It is well known that the NEA GaAs photo-cathode needs extremely high vacuum, because it is easily damaged. To study the detail process of the cathode property degradation by the damage, we construct a photo-cathode test bench with an extremely high vacuum quality based on a cryo-pump (2700l/s) and a NEG pump (1900l/s). The vacuum chamber is made of titanium (TP340) for low outgassing rate. We alredy obtain 1.7E-9Pa only with the cryo-pump. In this article, the test bench is briefly explained and the results of the first vacuum test is presented.
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M3 - Conference contribution
AN - SCOPUS:84886916032
SN - 9789290833529
T3 - IPAC 2010 - 1st International Particle Accelerator Conference
SP - 2326
EP - 2328
BT - IPAC 2010 - 1st International Particle Accelerator Conference
T2 - 1st International Particle Accelerator Conference, IPAC 2010
Y2 - 23 May 2010 through 28 May 2010
ER -