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-- PeterKammel - 20 Sep 2008

Test Measurements at PSI

Overview and Plan


First ideas and motivation for these measurements are described in Presentations and Drafts below.

We have received beam time at PSI July-8 to Aug-3 for our Mu2e testrun.

Thus far the following people have expressed interest in a participation and I have tentatively suggested tasks. Illinois will also try to get a good undergrad involved in this work for a Senior Research Thesis.

Jim and Justin, Boston NaI for RMC?
KK 2nd part of run
Vadim MC, hardware preparation, analysis
Haruo, Tito Los Alamos neutron detector
Peter, Dave, PeterW +3 students Beam, Si, DAQ
Yoshi Ushida, Imperial interested

Hardware Setup


  • Detector naming and notation


pic0.png pic1.png
pic2.png pic3.png



Ongoing work documentation


Si detector electronics


Charged particle emission

Vadim with Peter's help will perform a GEANT4 study of the experiment, with the main objectives:

  • Concept ok? Count rates?
  • Uncertainties in reconstructing the primary capture spectra from measured distributions. Optimization of Si detector size. Do we need near counter? Do we need He or vacuum, I hope not.
  • Basic hardware arrangement, do we need vacuum feedthrougths etc

We plan to use the following detectors

  • Entrance beam counters muPC and muSC available from MuCap experiment
  • target detector for BG measurement, use Si strip from Hogan, this is also a backup for MSX25
  • near detector, purchase or Si strip or none? MSX25 are made a thin as 20 um.
  • pfDet purchase from Micron
  • Illinois will build a muVeto counter and a thicker plastic counter for high energy protons.

Gamma detection

The idea is to measure the gamma spectra from RMC and radiative pion capture. Jim do you have a large NaI available? Let's estimate the rates. In rmc.pdf I summarized this process based on the Kauland thesis.

Neutron detection

We have liquid scintillation neutron detectors, capable of neutron-gamma discrimination. Does Los Alamos have calibrated neutron detectors and would be interested in unfolding the measured spectra?


Interest in measuring DIO was expressed, but it is not clear that the required instrumentation and expected statistics make such an effort worthwhile.


MuCap/MuSun/MuLan has a working DAQ system for chamber readout and FADC recording of scint/Si pulses. We also have preamps probably suited for the Si detectors. We will help to get the electronics started, but support during the run is required (Vadim,...).

If I use C/A ~ 1 [pF/cm] 1/w, w being the depletion width, we get

w(cm) C/A=1pF/w   A C
0.01 100.00 pF 1.00 100.00
0.15 6.67 pF 25.00 166.67
0.15 6.67 pF 9.00 60.00

So perhaps a 30x30 mm2 detector MSX09 is preferable, if the rate is ok.

Presentations and Drafts





Topic attachments
I Attachment History Action Size Date Who Comment
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Unknown file formatdwg A-1993.dwg r1 manage 122.5 K 2009-05-01 - 03:17 PeterKammel  
Compressed Zip archivezip Bernhard_Photo.zip r1 manage 5054.2 K 2009-04-30 - 14:03 PeterKammel  
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Unknown file formatJPG DSCN6194.JPG r1 manage 370.5 K 2009-05-27 - 23:31 PeterKammel  
PowerPointppt KammelCapture.ppt r1 manage 609.5 K 2009-02-16 - 23:34 PeterKammel  
PowerPointppt Kammel_PSI_Report_comp.ppt r1 manage 5454.0 K 2009-09-10 - 22:52 PeterKammel  
Unknown file formatT3001 MSQ.T3001 r1 manage 88.4 K 2009-05-27 - 14:18 PeterKammel  
PowerPointppt Mu2eTestPrep.ppt r1 manage 2213.5 K 2009-06-18 - 21:12 PeterKammel  
PDFpdf NW320_Chamber.pdf r2 r1 manage 191.7 K 2009-04-01 - 22:57 PeterKammel  
Compressed Zip archivezip PSITestCad.zip r2 r1 manage 2719.9 K 2009-04-01 - 22:22 PeterKammel  
PDFpdf TARGET__MSQ.pdf r1 manage 15.5 K 2009-05-27 - 14:19 PeterKammel  
Compressed Zip archivezip bernhard.zip r1 manage 5489.4 K 2009-05-29 - 13:13 PeterKammel  
PDFpdf capture.pdf r1 manage 1063.2 K 2009-02-16 - 23:34 PeterKammel  
PNGpng chamber0.png r1 manage 94.2 K 2009-03-23 - 21:44 PeterKammel  
PNGpng pic0.png r1 manage 100.3 K 2009-04-01 - 20:03 PeterKammel  
PNGpng pic1.png r1 manage 184.6 K 2009-04-01 - 20:03 PeterKammel  
PNGpng pic2.png r1 manage 91.8 K 2009-04-01 - 20:03 PeterKammel  
PNGpng pic3.png r1 manage 40.1 K 2009-04-01 - 20:04 PeterKammel  
PDFpdf rmc.pdf r1 manage 204.5 K 2009-05-06 - 03:59 PeterKammel  
PNGpng setup1.png r1 manage 137.5 K 2009-05-21 - 21:05 PeterKammel  
Compressed Zip archivezip si.zip r1 manage 2086.3 K 2009-04-30 - 14:11 PeterKammel  
Compressed Zip archivezip target.zip r2 r1 manage 332.1 K 2009-06-11 - 21:54 PeterKammel  
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Topic revision: r34 - 2010-12-09 - PeterKammel
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