1.06 $mu$m 150 psec laser damage study of diamond turned, diamond turned/ polished and polished metal mirrors

Conference · Thu Jul 24 04:00:00 EDT 1975

OSTI ID:4142675

Saito, T T; Milam, D; Baker, P; Murphy, G

Using a well characterized 1.06 $mu$m 150 ps glass laser pulse the damage characteristics for diamond turned, diamond turned/ polished, and polished copper and silver mirrors less than 5 cm diameter were studied. Although most samples were tested with a normal angle of incidence, some were tested at 45$sup 0$ with different linear polarization showing an increase in damage threshold for S polarization. Different damage mechanisms observed will be discussed. Laser damage is related to residual surface influences of the fabrication process. First attempts to polish diamond turned surfaces resulted in a significant decrease in laser damage threshold. The importance of including the heat of fusion in the one dimensional heat analysis of the theoretical damage threshold and how close the samples came to the theoretical damage threshold is discussed. (auth)

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• NSA Number: NSA-33-001101
• OSTI ID: 4142675
• Report Number(s): UCRL--76822(Rev.1); CONF-750730--2
• Country of Publication: United States
• Language: English

Related Subjects

*COPPER-- PHYSICAL RADIATION EFFECTS
*DIAMONDS-- PHYSICAL RADIATION EFFECTS
*SILVER-- PHYSICAL RADIATION EFFECTS
360206* --Materials--Ceramics
Cermets & Refractories-- Radiation Effects
ELECTRODEPOSITED COATINGS
ELECTROPLATING
LASER RADIATION
MACHINING
N50140* --Metals
Ceramics
& Other Materials--Ceramics & Cermets--Radiation Effects
N50240 --Metals
Ceramics
& Other Materials--Metals & Alloys--Radiation Effects
POLISHING