ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
A new array calorimeter detector has been developed and was used to measure the spatial profile of a KrF laser with 300 J energy and a 267 mm diameter in near field. The detector contains 441 (21×21) calorimeters. A tantalum foil is used as the absorber. The boiling of liquid nitrogen is used as the reference temperature of the thermocouples, as it is both insulating and stable. Thus, it is the basis of the physical measurement in the sub-μV–mV level with a multithermocouple detector. The response of the tantalum foil is linear in the range of fluence from 30 mJ/cm2 to 1.1 J/cm2. The experimental results show that the spatial profile of the KrF laser pumped by two side electron beams is saddle shaped with a valley at the center and one peak at each side of the center on the coaxial line of electron beams in the near field. With a decrease of the laser's gas pressure, the distribution become more even rather than flat. © 1998 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1148876
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