Details

Autor(en) / Beteiligte

• Kii, Toshiteru
• Miyasako, Atsushi
• Hayashi, Syusuke
• Masuda, Kai
• Ohgaki, Hideaki
• Yoshikawa, Kiyoshi
• Yamazaki, Tetsuo

Titel

Improvement of beam macropulse properties using slim thermionic cathode in IAE RF gun

Ist Teil von

• Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 2004-08, Vol.528 (1), p.408-411

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2004

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A long beam macropulse is strongly required for free-electron lasers. RF guns can potentially produce high brightness electron beam using a simple and compact system. However, due to a back-bombardment, a cathode surface is overheated. Thus, it is difficult to maintain a constant beam current and beam energy during a macropulse. The use of a photo cathode with a short-pulsed laser is one of the solutions, but it affects the simplicity and the compactness of the RF guns. We studied a mechanism of back-bombardment and experimentally and numerically found that a low energy component of the back-streaming electrons plays an important role in cathode surface heating.