BIW2012 - List of Authors (Hass, E.)

Paper

Title

Page

Fast Bunch Profile Monitoring with THz Spectroscopy of Coherent Radiation at FLASH

256

S. Wesch, C. Behrens, B. Schmidt
DESY, Hamburg, Germany
E. Hass
Uni HH, Hamburg, Germany

We developed a fast bunch profile monitor based on wavelength-resolved THz detection. An in-vacuum spectrometer with four dispersive gratings and parallel readout of 120 individual wavelength bins provides detailed shot-to-shot information on the bunch shape. The device can be operated in short (5-44 um) and long range (45-435 um) mode to cover the entire longitudinal phase space for compressed bunches of the FLASH linac. Due to the large wavelength range, the electron bunch time profile can be reconstructed reliably in detail using Kramers-Kronig algorithm for the phase retrieval. Performance of the instrument and results compared to direct time domain (TDS) measurements will be presented for electron bunches down to a few 10th femtoseconds length.

Slides THAP01 [7.475 MB]

Paper	Title	Page
THAP01	Fast Bunch Profile Monitoring with THz Spectroscopy of Coherent Radiation at FLASH	256
	S. Wesch, C. Behrens, B. Schmidt DESY, Hamburg, Germany E. Hass Uni HH, Hamburg, Germany
	We developed a fast bunch profile monitor based on wavelength-resolved THz detection. An in-vacuum spectrometer with four dispersive gratings and parallel readout of 120 individual wavelength bins provides detailed shot-to-shot information on the bunch shape. The device can be operated in short (5-44 um) and long range (45-435 um) mode to cover the entire longitudinal phase space for compressed bunches of the FLASH linac. Due to the large wavelength range, the electron bunch time profile can be reconstructed reliably in detail using Kramers-Kronig algorithm for the phase retrieval. Performance of the instrument and results compared to direct time domain (TDS) measurements will be presented for electron bunches down to a few 10th femtoseconds length.
	Slides THAP01 [7.475 MB]