Sadhana

, Volume 23, Issue 3, pp 303–312 | Cite as

Design and performance studies of an MCP based pinhole camera for laser-produced plasma diagnostics

  • Y B S R Prasad
  • V K Senecha
  • H S Vora
  • R K Khardekar
  • H C Pant
Article
Received:
Revised:

Abstract

An X-ray pinhole camera system has been developed and tested to obtain spatially resolved time-integrated X-ray images of laser-produced plasmas (Nd: YAG laser of 75mJ energy in 35 picoseconds) using a single stage micro channel plate (MCP) detector coupled to a CCD camera-frame grabber system instead of X-ray film. Thick slab targets of aluminium, copper and gold were used to produce plasmas with different X-ray yields at laser intensities ranging from 8 × 1011 to 8 × 1012 W/cm2. MCP gain was increased with the help of biasing voltages to record low intensity X-ray images, which have been analysed using an image processing software “PROMISE” developed in-house. The experimental results are presented.

Keywords

Laser-produced plasmas pinhole camera micro channel plate detectors X-ray imaging spatial resolution 

Abbreviations

MCP

micro channel plate detector assembly

CCD

charged couple device to record visible images electronically and store the information in the form of a matrix of intensities at each pixel

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References

  1. Begimkulov U S 1992 Laser produced plasma expansion in a uniform magnetic field.Laser Part. Beams 10: 723–735Google Scholar
  2. Eidmann K 1991 Conversion of laser light into soft X-rays with 3-ns and 30-ps laser pulses.Laser Part. Beams 9: 551–562Google Scholar
  3. Fraser G W 1984 X- andγ-ray imaging using microchannel plates.Nucl. Instrum. Methods 221: 115–130CrossRefGoogle Scholar
  4. Guskov S Yu 1994 Magnetic control of the plasma flows in laser targets.Laser Part. Beams 12: 371–377Google Scholar
  5. Hailey C J 1985 Microchannel plate intensified crystal spectrometer for use in soft X-ray spectroscopy.Rev. Sci. Instrum. 56: 1553–1556CrossRefGoogle Scholar
  6. Hamamatsu 1990MCP assembly instruction manual Google Scholar
  7. Koenig Z M 1988 Soft X-ray Bragg spectrograph with an intensified framing camera.Rev. Sci. Instrum. 59: 1813–1815CrossRefGoogle Scholar
  8. Pisarczyk T 1992 Formation of an elongated plasma column by magnetic confinement of a laser-produced plasma.Laser Part. Beams 10: 767–776CrossRefGoogle Scholar
  9. Schagen P 1974Advances in image pickup and display (New York: Academic Press) vol. 1, p. 1Google Scholar
  10. Shukla M 1995 X-ray enhancement in an external tranverse magnetic field confined laser produced plasma.Recent advances in plasma science and technology (PLASMA-95) (New Delhi: Allied Publishers) pp 187–194Google Scholar
  11. Vora H S 1996 PROMISE — a software package for profile measurement. CAT Report No. CAT/1996/10Google Scholar
  12. Wiza J L 1979 Micro channel plate detectors, (and another article)Nucl. Instrum. Methods 162: 587–601CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 1998

Authors and Affiliations

  • Y B S R Prasad
    • 1
  • V K Senecha
    • 1
  • H S Vora
    • 2
  • R K Khardekar
    • 1
  • H C Pant
    • 1
  1. 1.Laser Plasma Group, R & D Laboratory “D”Centre for Advanced TechnologyIndoreIndia
  2. 2.C V L Group, R & D Laboratory “C”Centre for Advanced TechnologyIndoreIndia

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