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          Institute: MPI für Kernphysik     Collection: Physics of Quantum Dynamics in Atomic Fragmentation     Display Documents



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ID: 206697.0, MPI für Kernphysik / Physics of Quantum Dynamics in Atomic Fragmentation
Status of the pulsed photoelectron source for atomic and molecular collision experiments
Authors:Schröter, C. D.; Rudenko, A.; Dorn, A.; Moshammer, R.; Ullrich, J.
Language:English
Date of Publication (YYYY-MM-DD):2005-01-11
Title of Journal:Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Journal Abbrev.:Nucl. Instr. Meth. A
Volume (in Journal):536
Issue / Number:3
Start Page:312
End Page:318
Name of Conference/Meeting:Xth Workshop on Polarized Sources and Targets (PST 2003)
Place of Conference/Meeting:Butker Institute of Nuclear Physics, Novosibirsk
(Start) Date of Conference/Meeting
 (YYYY-MM-DD):
2003-09-22
End Date of Conference/Meeting 
 (YYYY-MM-DD):
2003-09-26
Copyright:Copyright © 2004 Elsevier B.V. All rights reserved.
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:For kinematically complete experiments on the fragmentation dynamics of atomic and molecular systems by electron impact, inherently cold and bunched electron beams at energies from some 10 eV up to keV are needed. A short-pulsed photoelectron source has been set up to meet the beam specifications required for these experiments. The gun is in operation and delivers short electron pulses using GaAs/AlGaAs heterostructure crystals. A quantum efficiency of 3% and a cathode lifetime of one week have been achieved. Planned future collision measurements require intense beams of cold and well-collimated electrons at low energy (<100 eV). Design changes have been made to achieve this goal.
Free Keywords:Photoelectron source; Photocathode; Heterostructure; Reaction microscope
Classification / Thesaurus:85.60.Ha; 73.40.-c; 34.80.Dp; 39.30.+w
External Publication Status:published
Document Type:Conference-Paper
Affiliations:MPI für Kernphysik/Group J. Ullrich/Polarized Beams and Surface Physics (C.D. Schröter)
Identifiers:DOI:http://dx.doi.org/10.1016/j.nima.2004.08.090
URL:http://authors.elsevier.com/sd/article/S0168900204...
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