TY - JOUR
T1 - The Stuttgart positron beam, its performance and recent experiments
AU - Bauer, W.
AU - Briggmann, J.
AU - Carstanjen, H. D.
AU - Connell, S.
AU - Decker, W.
AU - Diehl, J.
AU - Maier, K.
AU - Major, J.
AU - Schaefer, H. E.
AU - Seeger, A.
AU - Stoll, H.
AU - Widmann, E.
PY - 1990/4/3
Y1 - 1990/4/3
N2 - A monoenergetic MeV positron (e+) beam, with a flux at present of 6 × 104 e+/s in the energy range of 0.5 to 6.5 MeV, has been installed at the Stuttgart Pelletron accelerator. The stabilization and the absolute calibration of the energy E is monitored by a Ge detector with real-time feedback; a relative energy stability of Δ E E ≤ 10-4 is obtained. So far, e+e- scattering and annihilation-in-flight experiments for investigating the low-energy e+e- interaction as well as β+ γ positron lifetime measurements in condensed matter have been performed. The advantages of the β+ γ method compared to the conventional γγ coincidence technique have been demonstrated. Recently, triple-coincidence positron "age-momentum correlation" measurements have been carried out on fused quartz. A brief account is given on the development of a "positron clock" aiming at a substantial improvement of the time resolution of the β+ γ positron lifetime measurements.
AB - A monoenergetic MeV positron (e+) beam, with a flux at present of 6 × 104 e+/s in the energy range of 0.5 to 6.5 MeV, has been installed at the Stuttgart Pelletron accelerator. The stabilization and the absolute calibration of the energy E is monitored by a Ge detector with real-time feedback; a relative energy stability of Δ E E ≤ 10-4 is obtained. So far, e+e- scattering and annihilation-in-flight experiments for investigating the low-energy e+e- interaction as well as β+ γ positron lifetime measurements in condensed matter have been performed. The advantages of the β+ γ method compared to the conventional γγ coincidence technique have been demonstrated. Recently, triple-coincidence positron "age-momentum correlation" measurements have been carried out on fused quartz. A brief account is given on the development of a "positron clock" aiming at a substantial improvement of the time resolution of the β+ γ positron lifetime measurements.
UR - http://www.scopus.com/inward/record.url?scp=0000076051&partnerID=8YFLogxK
U2 - 10.1016/0168-583X(90)90372-2
DO - 10.1016/0168-583X(90)90372-2
M3 - Article
AN - SCOPUS:0000076051
SN - 0168-583X
VL - 50
SP - 300
EP - 306
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 1-4
ER -