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LUND UNIVERSITY LIBRARIES

Design and Commissioning of an Ionization Intensity Monitor

Berg, Hanna LU (2019) FYSK02 20191
Atomic Physics
Department of Physics
Abstract
The dynamics of molecules and electrons takes place on timescales of femtoseconds and attoseconds, respectively. This requires ultrashort and intense extreme ultraviolet (XUV) pulses to be able to study them. Two sources that can generate intense XUV pulses are free-electron lasers (FELs) based on self amplified spontaneous emission (SASE) and high-order harmonic generation (HHG)driven by intense infrared (IR) laser.
At the Lund attosecond science centre (LASC) the intense XUV beamline generates XUV pulses via HHG. To accomplish ultrashort and intense XUV pulses it is essential to have methods for alignment and photon flux diagnostics. In this work I have designed an ionization intensity monitor (IIM) and integrated it in the intense XUV... (More)
The dynamics of molecules and electrons takes place on timescales of femtoseconds and attoseconds, respectively. This requires ultrashort and intense extreme ultraviolet (XUV) pulses to be able to study them. Two sources that can generate intense XUV pulses are free-electron lasers (FELs) based on self amplified spontaneous emission (SASE) and high-order harmonic generation (HHG)driven by intense infrared (IR) laser.
At the Lund attosecond science centre (LASC) the intense XUV beamline generates XUV pulses via HHG. To accomplish ultrashort and intense XUV pulses it is essential to have methods for alignment and photon flux diagnostics. In this work I have designed an ionization intensity monitor (IIM) and integrated it in the intense XUV beamline at LASC, with the purpose of measuring the photon flux of the generated XUV pulses. The design of the IIM is inspired by gas monitor detectors (GMDs) currently used at the soft X-ray FEL in Hamburg (FLASH) [1]. The working principle of the IIM is based on photoionization of rare gases and during commissioning it was shown that the IIM is sufficiently sensitive to
XUV pulses to obtain both an ion and an electron signal. Performed single shot measurements determine the correlation between travel time of charge carriers and induced potential. By varying the energy of the generating IR pulses we investigate the linearity between the number of generated electrons and the photon flux of the XUV pulses. (Less)
Please use this url to cite or link to this publication:
author
Berg, Hanna LU
supervisor
organization
course
FYSK02 20191
year
type
M2 - Bachelor Degree
subject
language
English
id
8987370
date added to LUP
2019-06-26 14:34:51
date last changed
2019-06-26 14:36:19
@misc{8987370,
  abstract     = {{The dynamics of molecules and electrons takes place on timescales of femtoseconds and attoseconds, respectively. This requires ultrashort and intense extreme ultraviolet (XUV) pulses to be able to study them. Two sources that can generate intense XUV pulses are free-electron lasers (FELs) based on self amplified spontaneous emission (SASE) and high-order harmonic generation (HHG)driven by intense infrared (IR) laser.
At the Lund attosecond science centre (LASC) the intense XUV beamline generates XUV pulses via HHG. To accomplish ultrashort and intense XUV pulses it is essential to have methods for alignment and photon flux diagnostics. In this work I have designed an ionization intensity monitor (IIM) and integrated it in the intense XUV beamline at LASC, with the purpose of measuring the photon flux of the generated XUV pulses. The design of the IIM is inspired by gas monitor detectors (GMDs) currently used at the soft X-ray FEL in Hamburg (FLASH) [1]. The working principle of the IIM is based on photoionization of rare gases and during commissioning it was shown that the IIM is sufficiently sensitive to
XUV pulses to obtain both an ion and an electron signal. Performed single shot measurements determine the correlation between travel time of charge carriers and induced potential. By varying the energy of the generating IR pulses we investigate the linearity between the number of generated electrons and the photon flux of the XUV pulses.}},
  author       = {{Berg, Hanna}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Design and Commissioning of an Ionization Intensity Monitor}},
  year         = {{2019}},
}