SYMPOSIA PAPER Published: 01 January 1988

Damage Threshold of Oscillator Mirrors in Mark III FEL


We have observed damage of gold resonator mirrors in the Mark III FEL with 1.2 microsecond macropulses at a fluence threshold of 21 J/cm2. This number agrees with YAG laser damage measurements scaled by the square root of the ratio of the pulse lengths. Silver coated mirrors have not shown damage up to an equivalent threshold of 40 J/cm2. Work aimed at increasing the pulse energy on the silver mirrors is continuing; we expect to extend these measurements in the near future.

Author Information

Deacon, DAG
Benson, SV
Madey, JMJ
Schultz, J
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Developed by Committee: F01
Pages: 405–408
DOI: 10.1520/STP24449S
ISBN-EB: 978-0-8031-5033-1
ISBN-13: 978-0-8031-4481-1