Position-sensitive, fast ionization chambers

J. Lai, Louisiana State University
L. Afanasieva, Louisiana State University
J. C. Blackmon, Louisiana State University
C. M. Deibel, Louisiana State University
H. E. Gardiner, Louisiana State University
A. Lauer, Louisiana State University
L. E. Linhardt, Louisiana State University
K. T. Macon, Louisiana State University
B. C. Rasco, Louisiana State University
C. Williams, Louisiana State University
D. Santiago-Gonzalez, Louisiana State University
S. A. Kuvin, Florida State University
S. Almaraz-Calderon, Florida State University
L. T. Baby, Florida State University
J. Baker, Florida State University
J. Belarge, Florida State University
I. Wiedenhöver, Florida State University
E. Need, Elon University
M. L. Avila, Argonne National Laboratory
B. B. Back, Argonne National Laboratory
B. DiGiovine, Argonne National Laboratory
C. R. Hoffman, Argonne National Laboratory

Abstract

A high-count-rate ionization chamber design with position-sensitivity has been developed and deployed at several accelerator facilities. Counting rates of ≥ 500 kHz with good Z-separation (up to 5% energy resolution) for particle identification have been demonstrated in a series of commissioning experiments. A position-sensitive capability, with a resolution of 3 mm, has been implemented for the first time to record position information and suppress pileup. The design and performance of the detectors are described.