High accuracy position response calibration method for a micro-channel plate ion detector

R. Hong (1) , A. Leredde (2) , Y. Bagdasarova (1) , X. Fléchard (3) , A. Garcia (1) , P. Mueller (2) , A. Knecht (4) , E. Liénard (3) , M. Kossin (5) , M. G. Sternberg (1) , H. E. Swanson (1) , D. W. Zumwalt (1)

1 University of Washington [Seattle]
2 ANL - Argonne National Laboratory [Lemont]
3 LPCC - Laboratoire de physique corpusculaire de Caen
4 PSI - Paul Scherrer Institute
5 UMD - Department of Physics [College Park]

We have developed a position response calibration method for a micro-channel plate (MCP) detector with a delay-line anode position readout scheme. Using an {\em in situ} calibration mask, an accuracy of 8~$\mu$m and a resolution of 85~$\mu$m (FWHM) have been achieved for MeV-scale $\alpha$ particles and ions with energies of $\sim$10~keV. For high statistics experiments, this method can be directly employed with the experimental data without any dedicated calibration runs. The improved performance of the MCP detector can find applications in many fields of AMO and nuclear physics. In our case, it helps reducing systematic uncertainties in a high-precision nuclear $\beta$-decay experiment.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

R. Hong, A. Leredde, Y. Bagdasarova, X. Fléchard, A. Garcia, et al.. High accuracy position response calibration method for a micro-channel plate ion detector. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016, 835, pp.42-51. ⟨10.1016/j.nima.2016.08.024⟩. ⟨in2p3-01323815⟩