1. Pre-Test-stands at MPI Munich
Xiang Liu
Introduction to Canberra REGe detector
Test A: Single- & double-photon escape
Test B: Single- & multi-site events through coincidence
Test C: Co60 photons angular correlation

2. Canberra REGE detector
Crystal inside
Dewar
Be window
Reversed Germanium Detector
Gerda Collab. , Jun 27-29, 2005
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3. Resolution
expected
Xiang Liu, MPI München

4. REGe efficiencies 10% REGe 10-2000keV 1% 0.1% 5keV 1MeV
Xiang Liu, MPI München

5. Test A: setup & simulation
Co60
Co60
Study single- double-escape events
And back-splash events
Gerda Collab. , Jun 27-29, 2005
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6. Test A: Measured energy spectrum
Gerda Collab. , Jun 27-29, 2005
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7. Test A: Closed look at Measured
SE: single escape, DE: double escape
Gerda Collab. , Jun 27-29, 2005
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8. Test A: Simulated An improvement of simulation is undergoing.
Gerda Collab. , Jun 27-29, 2005
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9. Test B: Single- & Multi-site event selection
photon
Co60 photon with single-compton scattering at 90 has fixed energy.
Gerda Collab. , Jun 27-29, 2005
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10. Test B:
Co60 source
Gerda Collab. , Jun 27-29, 2005
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11. Test B: Measured spectrum
Esum
= E_REGE1+E_REGE2
E_REGe1
E_REGe2
Gerda Collab. , Jun 27-29, 2005
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12. TestB: Esum=1173 or 1332keV Esum=1173 Esum=1332 E_REGe1 E_LEGe~360keV
Single Compton
scattering 90degree
Single-site event
E_REGe2
Xiang Liu, MPI München

13. Test B: MC simulation Data & MC comparison, pulse shape: Kevin’s talk
Gerda Collab. , Jun 27-29, 2005
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14. Test C:
Two REGe facing Co60 with the same distance at different angles.
Require coincidence trigger, measure the angular correlation of the two Co60 photons.
Gerda Collab. , Jun 27-29, 2005
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15. Conclusion Many tests done with the REGe detector.
Single- & double-escape photon events.
Single- & multi-site events.
Compared with MaGe MC simulations for verification.
These REGe detectors will help to study the naked Ge crystals.
Gerda Collab. , Jun 27-29, 2005
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