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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/18388377
Record Status
Checked
Record Id
18388377
Title
Optimization of plasma mirror reflectivity and optical quality using double laser pulses
Contributors
GG Scott (STFC Rutherford Appleton Lab. and Strathclyde Univ.)
,
V Bagnoud
,
C Brabetz
,
RJ Clarke (STFC Rutherford Appleton Lab.)
,
JS Green (STFC Rutherford Appleton Lab.)
,
RI Heathcote (STFC Rutherford Appleton Lab.)
,
HW Powell
,
B Zielbauer
,
TD Arber
,
P McKenna
,
D Neely (STFC Rutherford Appleton Lab. and Strathclyde Univ.)
Abstract
We measure a record 96 ±2.5% specularly reflected energy fraction from an interaction with a plasma mirror (PM) surface preionized by a controlled prepulse and find that the optical quality is dependent on the inter pulse time delay. Simulations show that the main pulse reflected energy is a strong function of plasma density scale length, which increases with the time delay and reaches a peak reflectivity for a scale length of 0.3 μm, which is achieved here for a pulse separation time of 3 ps. It is found that the incident laser quasi near field intensity distribution leads to nonuniformities in this plasma expansion and consequent critical surface position distribution. The PM optical quality is found to be governed by the resultant perturbations in the critical surface position, which become larger with inter pulse time delay.
Organisation
CLF
,
CI
,
STFC
Keywords
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Language
English (EN)
Type
Details
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Year
Journal Article
New J Phys
17 (2015): 033027.
doi:10.1088/1367-2630/17/3/033027
2015
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