High-brightness, high-current density cathode for induction linac FELs
Conference
·
OSTI ID:6707535
We have recently initiated an investigation to determine the intrinsic operating limits of an osmium coated dispenser cathode for use in free-electron lasers (FELs) driven by an induction linear accelerator. The experimental apparatus consists of a 5.1-cm-diam osmium coated dispenser cathode driven by a 250-kV, 10-..cap omega.., 35-ns Blumlein pulse line. The pepper pot technique is used to measure intrinsic cathode brightness and uniformity. Recent measurements have yielded brightness values exceeding 1 /times/ 10/sup 10/ A/m/sup 2/rad/sup 2/ for current densities up to 140 A/cm/sup 2/. We have also obtained quantitative data on cathode poisoning caused by a number of chemical agents of interest in the induction linac environment. 7 refs., 8 figs., 2 tabs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6707535
- Report Number(s):
- UCRL-99042; CONF-881049-38; ON: DE89003173
- Country of Publication:
- United States
- Language:
- English
Similar Records
Maximum voltage gradient, uniformity and brightness of dispenser cathodes
The ETA-2 induction linac as a high average power FEL driver
Status of the ETA-II (Experimental Test Accelerator II) linear induction accelerator: High brightness results
Conference
·
Thu Dec 31 23:00:00 EST 1987
·
OSTI ID:6909830
The ETA-2 induction linac as a high average power FEL driver
Conference
·
Mon Oct 16 00:00:00 EDT 1989
·
OSTI ID:7016040
Status of the ETA-II (Experimental Test Accelerator II) linear induction accelerator: High brightness results
Conference
·
Sat Dec 31 23:00:00 EST 1988
·
OSTI ID:5200078