Speakers
Dr
Loredana Gastaldo
(Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany)Mr
Philipp Chung-On Ranitzsch
(Kirchhoff-Institute for Physics, Heidelberg University, INF 227 D-69120 Heidelberg, Germany)
Description
The Electron Capture 163Ho experiment (ECHo) will investigate the electron neutrino mass in the sub-eV range by the kinematical analysis of the calorimetrically measured 163Ho spectrum. Low temperature metallic magnetic micro-calorimeters with 163Ho embedded in the absorber will be used for this experiment.
We have performed a series of preliminary tests with two magnetic micro-calorimeters having 163Ho ions implanted in the absorber. The electron capture spectrum of 163Ho that we have measured is presently the most accurate one showing an energy resolution of ΔEFWHM = 7.6 eV. The measured signal rise time is as fast as τ = 130 ns. We discuss the performance of single pixels and the analysis of the measured 163Ho spectrum.
For the next middle-scale experiment we have developed a novel 64-pixel detector consisting of two 32-pixel arrays which are read-out by means of the microwave multiplexing technique. We present the new detector design, describe the read-out scheme and discuss the achievable performance.
Primary author
Mr
Philipp Chung-On Ranitzsch
(Kirchhoff-Institute for Physics, Heidelberg University, INF 227 D-69120 Heidelberg, Germany)
Co-authors
Dr
Andreas Fleischmann
(Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany)
Prof.
Andreas Tuerler
(Laboratory of Radiochemistry and Environmental Chemistry, Paul Scherrer Institut, 5232 Villigen, Switzerland; Department for Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland)
Prof.
Christian Enss
(Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany)
Prof.
Christoph E. DUELLMANN
(Institute for Nuclear Chemistry, Johannes Gutenberg University, Fritz Strassmann Weg 2, D-55128, Mainz, Germany; GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstraße 1, 64291, Darmstadt, Germany; Helmholtz Institute Mainz, Johann-Joachim-Becherweg 36, 55128 Mainz, Germany)
Mr
Clemens Hassel
(Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany)
Dr
Holger Dorrer
(Laboratory of Radiochemistry and Environmental Chemistry, Paul Scherrer Institut, 5232 Villigen, Switzerland)
Dr
Karl Johnston
(Technische Physik, Universitaet des Saarlandes, 66041 Saarbruecken; CERN, Physics Department, 1211 Geneva 23, Switzerland)
Dr
Klaus Eberhardt
(Institute for Nuclear Chemistry, Johannes Gutenberg University, Fritz Strassmann Weg 2, D- 55128, Mainz, Germany; Helmholtz Institute Mainz, Johann-Joachim-Becherweg 36, 55128 Mainz, Germany)
Dr
Loredana Gastaldo
(Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany)
Mr
Mathias Wegner
(Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany)
Dr
Sebastian Kempf
(Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany)
Dr
Thierry Stora
(CERN, Physics Department, 1211 Geneva 23, Switzerland)
Dr
Ulli Koester
(Institut Laue-Langevin, BP 156, 6, rue Jules Horowitz, 38042 Grenoble Cedex 9, France)