Table of 12 GeV Beam Energy Measurements
- The MCC Hall C energy measurement tool was updated on May 16th 2019 to fix a problem that caused it to give the wrong beam energy. See elog. The logbook links, before May 16th 2019, will show the results of beam energy when there was a problem in the code. The correct beam energies in the table are and they were calculated using a separate code using the dipole string current listed in table.
- Synchrotron radiation is calculated for the full 34.3 deg bend of the Hall C dipole arc.
- June 20th 2019 , beam energy measurement the arcdipole magnets were only cycled to 270 amps. Normal cycle is to 494 amps. Elog entry summarizes the work
to get the power supplies to cycle to 494 amps. Elog entry by Jay about the cycling to 400 amps.
|Date||Logbook entry||Current||Beam energy||Sync rad||Hallc:p||1-(Beam Energy)/Hallc:p|
|Dec 12 2017||https://logbooks.jlab.org/entry/3503087||92.345||2.22178 +/- 0.00236||2214.36||0.0033|
|Jan 18 2018||https://logbooks.jlab.org/entry/3516186||268.150||6.42765 +/- 0.00306||0.00035||6404.37||0.0036|
|April 30 2018||https://logbooks.jlab.org/entry/3569862||443.656||10.60314 +/- 0.00415||0.00265||10597.7||0.0005|
|Oct 4 2018||https://logbooks.jlab.org/entry/3604084||443.487||10.59915 +/- 0.00415||0.00265||10597.6||0.0001|
|Dec 4 2018||https://logbooks.jlab.org/entry/3634940||159.6633||3.83345 +/- 0.0026||3821.20||0.0032|
|Dec 14 2018||https://logbooks.jlab.org/entry/3638789||205.523||4.94090 +/- 0.0028||4917.88||0.0047|
|March 13 2019||https://logbooks.jlab.org/entry/3667208||417.182||10.21404 +/- 0.00404||10205.4||0.0008|
|March 22 2019||https://logbooks.jlab.org/entry/3671165||258.207||6.19009 +/- 0.00302||6169.28||0.0034|
|March 28 2019||https://logbooks.jlab.org/entry/3673353||342.822||8.20883 +/- 0.00349||8184.96||0.0029|
|**June 20 2019||https://logbooks.jlab.org/entry/3691774||115.821||2.783625 +/- 0.00243||2772.02||0.0041|
|July 10 2019||https://logbooks.jlab.org/entry/3701511||152.424||3.66017 +/- 0.00256||3649.06||0.0030|