Development of a silicon strip detector for novel accelerators at SINBAD

Abstract

At the SINBAD facility (DESY Hamburg), novel particle acceleration techniques like dielectric laser acceleration (DLA) structures will be tested using the ARES linac. Due to the small size of these structures, the accelerated electron beams only have a very low (sub-pC) charge. To determine the energy distribution of these beams, a silicon strip detector for the ARES linac spectrometer is currently under development. This detector fulfils the requirements of high spatial resolution for low charge density beams. The detector consists of two 1 cm × 1 cm silicon strip sensors and readout components. The design of the detector, its components and an estimate of its behaviour for a specific electron beam distribution are presented and discussed.

A compact dielectric grating-based charged particle bunch length diagnostic device at ARES

“…A CCD-camera, InGaAs diode, or fiber coupled spectrometer will be used to detect the emitted radiation, depending on the intensity of the radiation and the resolution required. ARES is an S-band normal conducting linac [3,13,14] for accelerator research and development, that aims to provide sub-fs bunches in the near future. It is an excellent facility for testing this device since it has the ability to produce electron bunches of variable length on the scale of the grating period, and there will be an X-band TDS installed downstream of the experimental chamber to validate the diagnostic method proposed here.…”

“…Bunch length diagnostic techniques generally involve either correlating the longitudinal coordinate to a transverse component of the beam through beam deflection or streaking [3], which is destructive to the bunch, or inducing the bunch to radiate and measuring the resulting spectrum, which leaves the bunch intact. As a charged particle bunch passes through an unpowered dielectric grating, it will decelerate and radiate at a wavelength equal to the period of the grating, through the radiation mechanism known as Smith-Purcell Radiation (SPR) [4].…”