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A high spatio-temporal resolution optical pyrometer at the ORION laser facility
File | Description | Size | Format | |
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Orion_Pyrometry_2016.pdf | Published version | 1.07 MB | Adobe PDF | View/Open |
Title: | A high spatio-temporal resolution optical pyrometer at the ORION laser facility |
Authors: | Floyd, E Gumbrell, ET Fyrth, J Luis, JD Skidmore, JW Patankar, S Giltrap, S Smith, R |
Item Type: | Journal Article |
Abstract: | A streaked pyrometer has been designed to measure the temperature of ≈100 µm diameter heated targets in the warm dense matter region. The diagnostic has picosecond time resolution. Spatial resolution is limited by the streak camera to 4 µm in one dimension; the imaging system has superior resolution of 1 µm. High light collection efficiency means that the diagnostic can transmit a measurable quantity of thermal emission at temperatures as low as 1 eV to the detector. This is achieved through the use of an f/1.4 objective, and a minimum number of reflecting and refracting surfaces to relay the image over 8 m with no vignetting over a 0.4 mm field of view with 12.5× magnification. All the system optics are highly corrected, to allow imaging with minimal aberrations over a broad spectral range. The detector is a highly sensitive Axis Photonique streak camera with a P820PSU streak tube. For the first time, two of these cameras have been absolutely calibrated at 1 ns and 2 ns sweep speeds under full operational conditions and over 8 spectral bands between 425 nm and 650 nm using a high-stability picosecond white light source. Over this range the cameras had a response which varied between 47 ± 8 and 14 ± 4 photons/count. The calibration of the optical imaging system makes absolute temperature measurements possible. Color temperature measurements are also possible due to the wide spectral range over which the system is calibrated; two different spectral bands can be imaged onto different parts of the photocathode of the same streak camera. |
Issue Date: | 13-Sep-2016 |
Date of Acceptance: | 30-Jul-2016 |
URI: | http://hdl.handle.net/10044/1/55049 |
DOI: | https://dx.doi.org/10.1063/1.4962036 |
ISSN: | 0034-6748 |
Publisher: | AIP Publishing |
Journal / Book Title: | Review of Scientific Instruments |
Volume: | 87 |
Issue: | 11 |
Copyright Statement: | © 2016 American Institute of Physics. Review of Scientific Instruments 87, 11E546 (2016); |
Sponsor/Funder: | Engineering & Physical Science Research Council (EPSRC) Engineering & Physical Science Research Council (E |
Funder's Grant Number: | EP/H500227/1 EP/R511547/1 |
Keywords: | Science & Technology Technology Physical Sciences Instruments & Instrumentation Physics, Applied Physics 09 Engineering 02 Physical Sciences 03 Chemical Sciences Applied Physics |
Publication Status: | Published |
Article Number: | 11E546 |
Appears in Collections: | Physics Plasma Physics Faculty of Natural Sciences |