Picosecond x-ray sensor

Stephen M. Durbm, Aamer Mahmoud

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A coplanar stripline detector has been developed for picosecond resolution of x-ray synchrotron pulses. When triggered by synchronized 100 fs laser pulses, this detector measures the x-ray pulse waveform with 1 ps resolution, a 100-fold improvement compared to standard pump-probe experiments at synchrotron sources. The detectors have been fabricated with CMOS compatible microfabrication processes. Time resolution is limited by photocarrier lifetimes, which is typically hundreds of picoseconds in semi-insulating GaAs. Standard implantation techniques, which add defects that serve as trapping sites to produce subpicosecond lifetimes, are insufficient because of the large x-ray absorption depths. Instead, 8 MeV protons that penetrate hundreds of microns are implanted. Strong signals have been measured using focused monochromatic x-ray beams at the Advanced Photon Source (Argonne, IL, USA). Laboratory excitation with 100 fs laser pulses, instead of x-rays, demonstrates the feasibility of this detector. The 1 ps target time resolution allows for x-ray studies in a crucial time regime where laser-induced electronic excitations transfer energy to the atomic lattice.

Original languageEnglish
Title of host publicationProceedings of IEEE Sensors
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event11th IEEE SENSORS 2012 Conference - Taipei, Taiwan, Province of China
Duration: 28 Oct 201231 Oct 2012

Other

Other11th IEEE SENSORS 2012 Conference
CountryTaiwan, Province of China
CityTaipei
Period28/10/1231/10/12

Fingerprint

X rays
Laser pulses
Sensors
Detectors
Synchrotrons
Strip telecommunication lines
Microfabrication
Energy transfer
Light sources
Protons
Photons
Pumps
Defects
Lasers
Experiments

Keywords

  • coplanar strip lines
  • pump-probe
  • synchrotron
  • x-ray

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Durbm, S. M., & Mahmoud, A. (2012). Picosecond x-ray sensor. In Proceedings of IEEE Sensors [6411492] https://doi.org/10.1109/ICSENS.2012.6411492

Picosecond x-ray sensor. / Durbm, Stephen M.; Mahmoud, Aamer.

Proceedings of IEEE Sensors. 2012. 6411492.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Durbm, SM & Mahmoud, A 2012, Picosecond x-ray sensor. in Proceedings of IEEE Sensors., 6411492, 11th IEEE SENSORS 2012 Conference, Taipei, Taiwan, Province of China, 28/10/12. https://doi.org/10.1109/ICSENS.2012.6411492
Durbm SM, Mahmoud A. Picosecond x-ray sensor. In Proceedings of IEEE Sensors. 2012. 6411492 https://doi.org/10.1109/ICSENS.2012.6411492
Durbm, Stephen M. ; Mahmoud, Aamer. / Picosecond x-ray sensor. Proceedings of IEEE Sensors. 2012.
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