GRETINA Gamma - ray Tracker Status and EPICS Usage
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GRETINA EPICS Meeting 2005 1 GRETINA Gamma-ray Tracker Status and EPICS Usage Carl Lionberger Lawrence Berkeley National Laboratory
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GRETINA Gamma - ray Tracker Status and EPICS Usage. Carl Lionberger Lawrence Berkeley National Laboratory. GRETINA Intro. Diminutive form of GRETA (Gamma Ray Energy Tracking Array) = ¼ GRETA Developed by same group as Gammasphere - PowerPoint PPT Presentation
Transcript of GRETINA Gamma - ray Tracker Status and EPICS Usage
GRETINA EPICS Meeting 2005 1
GRETINA Gamma-ray TrackerStatus and EPICS Usage
Carl LionbergerLawrence Berkeley National Laboratory
GRETINA EPICS Meeting 2005 2
GRETINA Intro
• Diminutive form of GRETA (Gamma Ray Energy Tracking Array) = ¼ GRETA
• Developed by same group as Gammasphere• Ge crystals segmented and much closer
together than in GS; no BGO separators– 36 segments/crystal– 28 crystals in 7 cryostats
• http://grfs1.lbl.gov/
GRETINA EPICS Meeting 2005 3
Schedule (Fiscal Years)
WBS Task Name
1 GRETINA
1.1 Mechanical
1.1.2 Design
1.1.3 Production
1.2 Detector Module
1.2.1 Purchasing
1.2.2 Test/Characterize Module 1
1.2.3 Test/Characterize Rest of Modules
1.3 Electronics
1.3.2 Prototype
1.3.3 Production
1.4 Computing Systems
1.4.2 Prototype
1.4.3 Production
1.5 System Assembly
1.5.1 Prototype
1.5.2 Production
1.6 Project Management
1.7 Environment and Safety
1.12 Level 1 Milestones: Critical Decisions CD1 CD2/3A CD2/3B CD4
Complete test proc. and apparatus Complete test/charac. module
1
Award module contract Exercise option last module
Complete design/draw. support structure
Complete mechanical subsystem
Complete test DSP module
Start production DSP module
Award computer farm contract
Ready for prototype assembly
Ready for final assembly
CD0
3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 42003 2004 2005 2006 2007 2008 2009 2010 2011
GRETINA EPICS Meeting 2005 4
Data Acquisition system
Aux. Det. Trigger
Global TriggerModule
SignalDigitizers
Local TriggerModule
30 Crystals
Data Storage
2.2 MB/s
Aux. Det. Data
66 MB/s
70 dual Processors
Workstations, Servers
6.9 MB/s
2.3 MB/s + Aux. Data
NetworkSwitch
Processing Farm
ReadoutComputer
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Status
• Testing detectors
• Have custom digitizer (VME)
• Developing EPICS support
• Developing software requirements and algorithms
• Cd2a/3a
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EPICS Status
• Drivers– GRETINA Digitizer– CAEN V977 Digital I/O– CAEN V830 Scaler
• One test IOC
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EPICS Tools
• Edm
• Vdct
• CaPython
• Sequencer
• Channel Archiver
• SCA
GRETINA EPICS Meeting 2005 14
Projected PV count
• Global 100– – expect several times increase
• Per crate 625 * 28 crates = 17,500– Might double
