Field emission gun for X-ray tubes

✍ Scribed by A.S. Baturin; A.I. Trufanov; N.N. Chadaev; E.P. Sheshin

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 262 KB
• Volume: 558
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2005.11.033

✦ Synopsis

The attempt to replace hot cathode with field emission cathode in a commercial X-ray tube have been made. We are continuing investigation of emission properties of the carbon fibers. Cathodes for X-ray tube were made from bundle of carbon fibers. The prototype provides 0.1 mA with focus spot about +2 mm under continued 40 kV mode. Each tube contain cathode made of single fibers bundle. The matrix cathode to increase total tube current up to 10 mA/cm 2 for macro cathode structure is also considered.