Paper |
Title |
Page |
TUPG022 |
Transverse Beam Profile Monitoring using Scintillation Screens for High Energy Ion Beams |
183 |
|
- K. Renuka, W. Ensinger
TU Darmstadt, Darmstadt, Germany
- C.A. Andre, F. Becker, P. Forck, R. Haseitl, A. Reiter, B. Walasek-Höhne
GSI, Darmstadt, Germany
|
|
|
The systematic studies of transverse profile measurement were carried out with scintillation screens such as single crystals (CsI:Tl, YAG:Ce), powder screens (P43, P46), ceramics (Al2O3, Al2O3:Cr, Y and Mg doped ZrO2), Ce doped (0.3%) and undoped glasses (Herasil). Different ion beams like C, Ne, Ta, and U accelerated to energy of 300 MeV/u were extracted from the heavy ion synchrotron at GSI within 0.3 s for intensities from 104 to 109 particles per pulse. The image of each beam pulse was recorded by a CCD camera and individually evaluated. The recorded image profiles show a reproducible dependence on scintillation screen. A difference in image width up to 50% is noticed between CsI:Tl and Herasil. The detailed investigation shows that the powder screens P43 and P46, ceramics Al2O3 and Al2O3:Cr reproduce the beam width within a difference of ± 4% for all intensities. The light yield from the screens scales linearly over 5 orders of magnitude of particle intensity. The light yield per energy deposition by a single ion was calculated for different ion beams. This normalized light yield is a factor of 2 higher for Carbon ions compared to Uranium.
|
|
|