Radiation Detection with Alignment Sensors



Muon Upgrade Meeting
CERN, 11-NOV-09


Kevan Hashemi, James Bensinger
Physics Department
Brandeis University
http://alignment.hep.brandeis.edu


Note: We removed the page that claimed the spots in an image were the result of fast neutrons interacting with the sensor pixels. We had no basis for this claim, and the fast neutrons involved were mixed with gamma rays, which we know are capable of giving such hits.

Note: We corrected the probability density function for Y-90 beta particle production. In the original talk, this plot was scaled incorrectly. In the corrected version, the area under the curve is 1.0.



Contents

Introduction
Neutron Hits
Dosimeter Hardware
Dosimeter Software
Ionizing Sources
Triple Event
Bright Event
Smeared Event
Strontium-90
Electron Energy
Hit Rates
Dose Rate
Conclusion

Introduction

Reported in August:

Today's Talk:

Dosimeter Hardware

Dosimeter Software

Ionizing Sources

Four sources of β and γ radiation, with taped image sensor.

Triple Event

Bright Event

Smeared Event

Strontium-90

Electron Energy

Hit Rates

Range Nylon (mm) Steel (mm) Glass (mm) Tape (mm) Hit Rate
5.03.00.00.80.218%
4.02.00.00.80.253%
4.252.00.250.80.217%
4.52.00.500.80.25%
4.752.00.750.80.21%

Dose Rate

Conclusion