Cold Model Cavity for 20-K Cryocooled C-band Photocathode RF Gun
| Autor: | Tanaka, Toshinari, Fukuda, Masafumi, Inagaki, Manabu, Nagashima, Ryoko, Nakao, Keisuke, Nogami, Kyoko, Sakai, Takeshi, Satoh, Daisuke, Takatomi, Toshikazu, Takatsuka, Kento, Terunuma, Nobuhiro, Urakawa, Junji, Yoshida, Mitsuhiro |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Scopus-Elsevier |
| DOI: | 10.18429/jacow-ipac2016-wepmy037 |
| Popis: | A cryocooled 2.6-cell C-band photocathode RF gun is under development at Nihon University in collaboration with KEK. The RF characteristics of a pillbox-type 2.6-cell C-band RF cavity at 20 K were in agreement with the theoretical predictions. The result of the cold test for a cavity with the input coupler confirmed the same characteristics. Based on these results a refined cold model of the 20-K cryocooled photocathode RF gun has been designed using SUPERFISH and CST-STUDIO. The separation between the TM01 pi and the TM01 half-pi modes has been increased from 20 MHz to 52 MHz by extending the diameter of the cavity iris and reducing the disk thickness. The 2.6-cell structure has been modified from pillbox to ellipsoid-like type. The end-plate of the 0.6-cell cavity has a center hole for bead-pull measurements of the on-axis electric filed through the entire structure. Mounting of a photocathode assembly in the end-plate has not been considered, since the purpose is solely to measure the low-power and low-temperature RF characteristics. A new design for the input coupler has been employed. The cavity will be completed early in 2016. Proceedings of the 7th Int. Particle Accelerator Conf., IPAC2016, Busan, Korea |
| Databáze: | OpenAIRE |
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