ELOG ISOLDE

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ISOLDE

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Entry time:	Tue Mar 25 20:24:03 2025
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> Please see https://elog.ph.ed.ac.uk/ISOLDE/203 for the E_cm calculations. > > Presently, we are scheduled for 9 days: > Nov 26-28 are three (3) days nominally for beam development > Nov 29-Dec 4 are six (6) days nominally for physics data taking > > It is not required to use all beam dev time at the beginning of the run, and we can take data in here with a beam we like before moving on. We do, however, have to care for the fact that over the weekend of 1-2 Dec that we cannot > change the beam (no operators) nor our target (no RP). > > ==Tentative Run Plan== > 1 day for ion source and 2.8 MeV beam dev > 1 day for High E_cm statistics, using the 6 um Ti foil > 1 day for lower energy beam dev (for use with mid E_cm) > 1.5 days for Mid E_cm statistics > (Switch back to 2.8 MeV/u beam, takes under 1 hour) > 4.5 days for Low E_cm > > ---Total 9 days--- > > ==Conditions== > > The High E_cm and Low E_cm can not only share the same 2.8 MeV/u beam, which is considered a fairly easy beam since this is the nominal REX energy. > > The Mid E_cm requires its own beam, and we have two conditions to choose from. > > =High E_cm= > 6um Ti, 2.8 MeV/u beam: Ecm=5.56-5.86 MeV > Pro: Beam energy is 'easy' > Pro: Can share E_beam with Low E_cm > > =Mid E_cm= > 2.5um HAVAR, 2.2 MeV beam: Ecm=4.76-5.06 MeV > Pro: Beam energy was delivered previously in 2012 > Con: Physics protons show up below the elastic ones > > 3um Ti, 1.88 MeV/u beam: Ecm=4.27-4.58 MeV > Pro: Physics protons show up above the elastic ones > Pro: We already made the gas cell > Pro: Very similar E_cm to Margerin (but different conditions) > Con: Beam energy might be difficult to achieve (but possible) > > =Low E_cm= > 12.5 Al, 2.8 MeV/u beam: Ecm=3.41-3.72 MeV > Pro: We have the foil installed and tested > Pro: Beam is 'easy' > Pro: Can share E_beam with High E_cm Encoding: HTML ELCode plain Suppress Email notification

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