Abstract
A new and different time-variant pulse processing system has been developed based on a simple CR-RC filter and two analog switches. The new pulse processing technique combines both ballistic deficit immunity and resilience to parallel noise without a significant compromise to the low energy resolution, generally considered a mutually exclusive requirement. The filter is realized by combining two different pulse shaping techniques. One of the techniques creates a low rate of curvature at the pulse peak, which reduces ballistic deficit, while the second technique increases the tolerance to low-frequency noise by modifying the noise history. Several experimental measurements are presented, including tests on a coplanar grid CdZnTe detector. Improvements on both the resolution and line shape are shown for the 662 keV line of 137Cs.
| Original language | English |
|---|---|
| Pages (from-to) | 450-454 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Nuclear Science |
| Volume | 48 |
| Issue number | 3 I |
| DOIs | |
| State | Published - Jun 2001 |
| Externally published | Yes |
| Event | 2000 Nuclear Science Symphosium (NSS) - Lyon, France Duration: Oct 15 2000 → Oct 20 2000 |
Funding
Manuscript received October 25, 2000; revised March 7, 2001 and March 15, 2001. This work was supported in part by the Department of Energy under Contract W-7405-ENG-48. L. Fabris, F. S. Goulding, and N. W. Madden are with the Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA (e-mail: [email protected]). J. A. Becker is with Lawrence Livermore National Laboratory, Livermore, CA 94550 USA (e-mail: [email protected]). Publisher Item Identifier S 0018-9499(01)05084-5.
Keywords
- Ballistic deficit
- Pulse shaping
- Signal-to-noise optimization
- Time-variant filters