Quick search Find article
Quick search
Find article

Photoelectron spectroscopy as a non-invasive method to monitor SASE-FEL spectra

OPEN ACCESS

M Wellhöfer1, J T Hoeft1, M Martins1, W Wurth1, M Braune2, J Viefhaus2,3, K Tiedtke3 and M Richter4

Show affiliations


Since the summer of 2005, the vacuum ultra-violet Free-electron LASer in Hamburg (FLASH) has operated as a user facility at the Deutsches Elektronen-Synchrotron (DESY), delivering ultra-short laser pulses of tens of femtosecond duration with a high peak brilliance of up to 1028 photons/(s mm2 mrad2 0.1% bandwidth). Due to the statistics of the Self-Amplified Spontaneous Emission (SASE) process, each photon pulse differs from the previous one in the number of modes per pulse, the wavelength (0.5% fluctuations) and the intensity, making experiments more complicated. Thus, for certain experiments the detailed knowledge of the beam properties on a shot-to-shot basis is mandatory. In this paper we describe an online method to gain spectral information about the individual Free-Electron Laser (FEL) pulses that is based on rare-gas photoionization and photoelectron spectroscopy.

Keywords

Instrumentation for FEL

Vacuum-based detectors

Gaseous detectors

Interaction of radiation with matter

PACS

41.60.Cr Free-electron lasers

29.40.Cs Gas-filled counters: ionization chambers, proportional, and avalanche counters

29.20.dk Synchrotrons

41.60.Ap Synchrotron radiation

Subjects

Accelerators, beams and electromagnetism

Nuclear physics

Instrumentation and measurement

Particle physics and field theory

Dates

Issue 02 (February 2008)

Received 4 July 2007, accepted for publication 2 January 2008

Published 8 February 2008



Related review articles

What's this?
View review articles related to this research to gain an insight into the key trends in this subject area. Related review articles are selected based on PACS/MSC codes, and are no more than three years old.

  1. Light-field streaking for FELs
  2. Gravitational radiation of systems and the role of their force field
  3. The quark–gluon medium
More

View by subject




Export








Please login to access our web services, or create an account if you don't yet have one.

You must have cookies enabled in your web browser to be able to login.

Username
Password

Forgotten your password? Get a new one here.