dorsal/arxiv
View SchemaThe Bunch Injection Controller for the PEP-II Storage Rings
| Authors | R. Chestnut, A. Fisher |
|---|---|
| Categories | |
| ArXiv ID | physics/0112065 |
| URL | https://arxiv.org/abs/physics/0112065 |
| Journal | eConf C011127 (2001) FRBT003 |
Abstract
The PEP-II storage rings at SLAC each have 3492 'buckets' into which electrons and positrons can be injected into the high- and low-energy rings. Equipment to measure the currents of all the individual buckets was originally provided by the Lawrence Berkeley Laboratory and is implemented in VXI-based hardware. Data from this equipment as well as high precision direct current measurement provide the hard data for the Bunch Injection Controller. A large number of parameters determined by injection design considerations as well as set by operators for different circumstances are also used by the software algorithms to determine the desired bucket injection order and charge quantity for each injection pulse. These requests are then passed on to the venerable SLAC master pattern generator, which provides beams for other applications as well. This highly visible and highly successful system is implemented using the EPICS toolkit, and fits well into the merged SLAC EPICS/SLC control system. The Bunch Injection Controller hardware is a VME-based EPICS IOC, which makes extensive use of shared memory for communicating with the VXI measurement equipment and the SLAC master pattern generator.
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"abstract": "The PEP-II storage rings at SLAC each have 3492 \u0027buckets\u0027 into which\nelectrons and positrons can be injected into the high- and low-energy rings.\nEquipment to measure the currents of all the individual buckets was originally\nprovided by the Lawrence Berkeley Laboratory and is implemented in VXI-based\nhardware. Data from this equipment as well as high precision direct current\nmeasurement provide the hard data for the Bunch Injection Controller. A large\nnumber of parameters determined by injection design considerations as well as\nset by operators for different circumstances are also used by the software\nalgorithms to determine the desired bucket injection order and charge quantity\nfor each injection pulse. These requests are then passed on to the venerable\nSLAC master pattern generator, which provides beams for other applications as\nwell. This highly visible and highly successful system is implemented using the\nEPICS toolkit, and fits well into the merged SLAC EPICS/SLC control system. The\nBunch Injection Controller hardware is a VME-based EPICS IOC, which makes\nextensive use of shared memory for communicating with the VXI measurement\nequipment and the SLAC master pattern generator.",
"arxiv_id": "physics/0112065",
"authors": [
"R. Chestnut",
"A. Fisher"
],
"categories": [
"physics.ins-det"
],
"journal_ref": "eConf C011127 (2001) FRBT003",
"title": "The Bunch Injection Controller for the PEP-II Storage Rings",
"url": "https://arxiv.org/abs/physics/0112065"
},
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