Job ID: 131550


California Institute of Technology

  • Oct. 15, 2019
  • Open until filled
  • November 2019
  • Post-Doc
  • Engineering Physics

Postdoctoral position at Caltech in the Bellan Plasma Group

  • Recent Ph.D. degree in Experimental Plasma Physics or closely related field
  • Preferred experience: X-ray imaging techniques, coded aperture methods, general plasma diagnostics, pulsed power operation, fast data acquisition, measurement of low-level signals in an extremely noisy environment
  • Required knowledge: optics, imaging, X-ray spectroscopy, plasma physics, numerical techniques for data analysis, electronics, vacuum techniques
  • General: Excellent oral and written communication skills
    This position is to participate in construction, deployment, operation, and analysis of a new X-ray imaging diagnostic. A coded aperture imaging system for radiation that cannot be focused using conventional optical methods will be constructed and demonstrated to work with X-rays in the multi-kilovolt range. After testing at Caltech, this system will be fielded on pulsed, intermediate-density fusion experiments elsewhere. The spatial location of the X-ray source and possibly other forms of radiation (gamma rays) or energetic particles (neutrons) will be measured. This will be done in association with a graduate student who has already done significant initial work. Prototypes will be tested at Caltech before being used elsewhere.

Publications relating to previous work at Caltech on this are:

Coded aperture: Haw, Magnus A. and Bellan, Paul (2015) 1D fast coded aperture camera. Review of Scientific Instruments, 86 (4). Art. No. 043506.

X-ray detection: Marshall, R. S. and Flynn, M. J. and Bellan, P. M. (2018) Hard x-ray bursts observed in association with Rayleigh-Taylor instigated current disruption in a solar-relevant lab experiment. Physics of Plasmas, 25 (11). Art. No. 112101.

Appointment is for one year with extension to second year if performance satisfactory.

Applicants should submit the following:
1. Paragraph explaining interest in position and giving evidence of suitability
2. Resume
3. Names of three references

These items should be sent to Professor Paul M. Bellan:

Information on group at

  • Caltech is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, or national origin, disability status, protected veteran status, or any other characteristic protected by law.

Please reference in your cover letter when
applying for or inquiring about this job announcement.

Contact Information

  • Professor Paul Bellan
    Applied Physics and Materials Science
    California Institute of Technology
    MC 128-95 Caltech
    Pasadena, CA 91125

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