Emittance compensation solenoid of a DC photo-cathode electron gun

Nagai, Ryoji; Hajima, Ryoichi; Nishimori, Nobuyuki; Iijima, Hokuto; Sawamura, Masaru; Kikuzawa, Nobuhiro ; Minehara, Eisuke

An emittance compensation solenoid magnet is designed for a DC photo-cathode electron gun. The DC gun is now in fabrication at JAEA for an energy-recovery linac (ERL) light-source. The ERL light-source requires very low emittance electron beam to generate coherent X-rays. In order to produce the very low emittance electron beam from the DC gun, a focusing lens is indispensable to compensate the linear emittance growth. A solenoid magnet is employed for the emittance compensation lens. The solenoid magnet consists of a main coil, pure iron yoke, and a backing coil. The compensated emittance is estimated less than 0.6 mm-mrad in the bunch charge of 77 pC by PARMELA simulation.

Language	:	Japanese
Journal	:	Proceedings of 4th Annual Meeting of Particle Accelerator Society of Japan and 32nd Linear Accelerator Meeting in Japan (CD-ROM)
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Pages	:	p.673 - 675
Publication Year/Month	:	2007/00
Meeting title	:	第4回日本加速器学会年会・第32回リニアック技術研究会
Held date	:	2007/08
Location (city)	:	和光
Location (country)	:	日本
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Registration No. : BB20071100
JAEA Abstracts No. : 36000138
Paper Submission No. : 3472

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