Download DGF Pixie-4 - User`s Manual

Table of Contents
1 Overview..................................................................................................................................................3
1.1 Features.............................................................................................................................................3
1.2 Specifications....................................................................................................................................4
2 Setting Up.................................................................................................................................................5
2.1 Installation.........................................................................................................................................5
2.2 Getting Started...................................................................................................................................6
3 Navigating the Pixie Viewer...................................................................................................................10
3.1 Overview.........................................................................................................................................10
3.2 Setup Group.....................................................................................................................................11
3.3 Run Control Group..........................................................................................................................16
3.4 Results Group..................................................................................................................................16
3.5 Optimizing Parameters....................................................................................................................18
3.6 File Series........................................................................................................................................20
4 Data Runs and Data Structures...............................................................................................................24
4.1 Run Types.......................................................................................................................................24
4.2 Output Data Structures....................................................................................................................26
5 Hardware Description.............................................................................................................................32
5.1 Analog Signal Conditioning............................................................................................................32
5.2 Real-time Processing Units..............................................................................................................33
5.3 Digital Signal Processor (DSP)........................................................................................................33
5.4 PCI Interface...................................................................................................................................34
6 Theory of Operation...............................................................................................................................35
6.1 Digital Filters for γ-ray Detectors....................................................................................................35
6.2 Trapezoidal Filtering in the Pixie-4................................................................................................37
6.3 Baselines and Preamplifier Decay Times .......................................................................................38
6.4 Thresholds and Pile-up Inspection...................................................................................................39
6.5 Filter Range.....................................................................................................................................42
6.6 Dead Time and Run Statistics..........................................................................................................42
7 Operating Multiple Pixie-4 Modules Synchronously..............................................................................55
7.1 Clock Distribution ..........................................................................................................................55
7.2 Trigger Distribution.........................................................................................................................57
7.3 Run Synchronization ......................................................................................................................60
7.4 External Gate and Veto (GFLT)......................................................................................................61
7.5 External Status.................................................................................................................................63
7.6 Coincident Events............................................................................................................................64
8 Using Pixie-4 Modules with Clover detectors.........................................................................................68
9 Troubleshooting......................................................................................................................................69
9.1 Startup Problems.............................................................................................................................69
9.2 Acquisition Problems......................................................................................................................71
10 Appendix A..........................................................................................................................................73
10.1 Front end jumpers for termination and attenuation.......................................................................73
10.2 Clock Jumpers..............................................................................................................................74
10.3 PXI backplane pin functions.........................................................................................................75
10.4 Control and Status Register Bits...................................................................................................76
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PIXIE-4 User’s Manual V2.54
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