Published 2013 | Version v1
Miscellaneous Metadata-only

Development of new photocathode materials and its quantum efficiency improvement for high brightness electron gun

Creators

  • 1. Tokyo Inst. of Technology, Graduate School of Science and Engineering, Tokyo (Japan)
  • 2. High Energy Accelerator Research Organization (KEK), Accelerator Division, Tsukuba, Ibaraki (Japan)
  • 3. Tokyo Inst. of Technology, Research Laboratory for Nuclear Reactors, Tokyo (Japan)
  • 4. Univ. of Yamanashi, Faculty of Engineering, Institute of Inorganic Synthesis, Kofu, Yamanashi (Japan)

Description

New photocathode material is being developed for high charge electron guns. We succeeded in developing an iridium cerium (Ir5Ce) photocathode and Cu:C12A7 electride photocathode. The iridium cerium photocathode has a reasonably high QE (∼9.1×10-4 (a)213nm at room temperature) and long lifetime (> LaB6). Furthermore, the QE of Ir5Ce photocathode was increased to a maximum value of 2.70×10-3 by heating at 1006°C. These great advantages of Ir5Ce photocathode led to generate the electron beams with a maximum charge of 4.4 nC/bunch using a new-type RF gun at a test bench of KEK electron linac. Cu:C12A7 is originally an electrical insulator. Cu:C12A7, however exhibits an excellent electrical conductivity and low work function (≈2.5 eV) after a reduction process at 1100°C for 48 hours using a titanium powder. Finally, we found that Cu:C12A7 electride has a QE of 8.72×10-4 (a)213nm at 600°C. (author)

Part of:
Proceedings of the 10th annual meeting of Particle Accelerator Society of Japan

Additional details

Identifiers

URL
http://www.pasj.jp/dai10kainenkai/;

Publishing Information

Imprint Title
Proceedings of the 10th annual meeting of Particle Accelerator Society of Japan
Imprint Pagination
[1123 p.]
Journal Page Range
[4 p.]

Conference

Title
10. annual meeting of Particle Accelerator Society of Japan
Dates
2-6 Aug 2013
Place
Nagoya, Aichi (Japan)

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
46112287
Subject category
S43: PARTICLE ACCELERATORS;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
ACCELERATORS; BEAM EMITTANCE; BRIGHTNESS; ELECTRON BEAMS; ELECTRON GUNS; ELECTRON SOURCES; LIFETIME; MATERIALS TESTING; PERFORMANCE; PHOTOCATHODES; QUANTUM EFFICIENCY
Descriptors DEC
BEAMS; CATHODES; EFFICIENCY; ELECTRODES; LEPTON BEAMS; OPTICAL PROPERTIES; PARTICLE BEAMS; PARTICLE SOURCES; PHYSICAL PROPERTIES; RADIATION SOURCES; TESTING

Optional Information

Notes
10 refs., 9 figs.