InAlGaAs/AlGaAs Superlattices for Polarized Electron Photocathodes

Conference · Mon Aug 15 00:00:00 EDT 2005

OSTI ID:878779

Mamaev, Yu A; Subashiev, A V; Yashin, Yu P; Gerchikov, L G; Maruyama, T; Luh, D -A; Clendenin, J E; Ustinov, V M; Zhukov, A E

Highly efficient emitters of polarized electrons based on the InAlGaAs/AlGaAs superlattice give an optimistic prognosis to explorations of such structures as the sources for accelerators. A new set of these SL structures with minimized conduction band offset was designed and recently tested. A new technology of surface protection in MBE growth leads to a significantly reduced heat-cleaning temperature. At these lowered cleaning temperatures, the thermal degradation of the working structure parameters is avoided. As a result a polarization P of up to 91% at corresponding quantum efficiency (QE) of 0.3% was achieved at room temperature.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 878779
• Report Number(s): SLAC-PUB-11403; TRN: US0602576
• Resource Relation: Conference: Contributed to 13th International Symposium on Nanostructures: Physics and Technology, St. Petersburg, Russia, 20-25 Jun 2005
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
CLEANING
ELECTRONS
NANOSTRUCTURES
PHOTOCATHODES
PHYSICS
POLARIZATION
QUANTUM EFFICIENCY
SUPERLATTICES
THERMAL DEGRADATION
Accelerators
ACCPHY
MATSCI