Beam Physics Activities and Research at TRIUMF

15 May 2006

Rick Baartman

Introduction

The group consists of the following members:
Rick Baartman (head)
Mike Craddock (retired)
Jacob Doornbos
Fred Jones
Dobrin Kaltchev
Shane Koscielniak
Yi-Nong Rao
Larry Root
These had previously been scattered at TRIUMF among 3 different divisions, even though their work was essentially all under the subject of Beam Physics (or "Accelerator Research"). Since September 2004, they form one group.
The work covers a broad spectrum, group meets about once a month to present progress reports; group has a travel budget.
Presented below is a summary of work being done, divided into: Internal, External, Academic.

Internal TRIUMF Activities

ActivityPeopleDescription
Modeling Cyclotron Extraction Rao, BaartmanDiscovered an error in code used to track beams from stripper to beamline. This affects all primary beamlines. Can now successfully model the beam. (EOM)
2A HaloRao, Baartman, Root, DoornbosNeed to transport up to 100 mA with < 1nA/metre loss. This requires understanding at the < 10-5 level. (foil, gas, ...)
2A stability during 1A/2A runningRoot, RaoRIB production targets are fragile, so need tight tolerance. Beam on stripper is only about 1mm wide, so shaking the orbit centre by 100 mm already causes difficulties. Feedback technique results.
Intensity Limitations of the TRIUMF CyclotronRoot, BaartmanEventually, we would like to run reliably at 400 mA total beam. There is a space charge limit at injection of about 10 mA per degree of phase acceptance. Exceedingly difficult to simulate. Experiment.
Detailed understanding of Inflector MatchingBaartman, RootNeed a spare inflector, need a new vertical section for ISIS.
Cyclotron Operator TrainingRootBetatron motion, isochronism, beam plane steering with trim and harmonic coils, etc.
ISAC Operator TrainingBaartmanQuads, Benders, Slits, Steerers (talk)
On-line optics modelsBaartmanFor training, demos, investigating and developing new tunes. ENVtk
ISAC beamline designBaartman, KaltchevCurrently: TITAN, ISAC-2 experimental hall, CSB, EMMA.
Secondary beamline design/upgradeDoornbosM9, M20
ISAC-3 ideasCraddock, KaltchevPossible accelerator/storage ring for RIBs

Many smaller jobs:

PeopleDescription
RootTrack electrons for SEM design
BaartmanSoftware for online emittance analysis
BaartmanSoftware for ISIS and ISAC scanners
RaoSoftware for 2A 3-wire scanners
RootSoftware for cyclotron probes
Root, RaoConverting/updating cyclotron software

External Collaborations

ActivityPeopleDescription
ILCKoscielniakDesign of damping ring. GDE Workshop here this summer.
J-PARCKoscielniakDesign of transverse damper (just getting started).
Secondary beam channels at J-PARCDoornbosKaons, decay muons, surface muons.
CIAERao, BaartmanDesign 70 MeV cyclotron
D-Pace, THALESRao, BaartmanDesign/upgrade cyclotrons by contract (100k$ net so far).
GEANT4Jones
LHC CollimatorsKaltchevDesign work is completed, but commissioning work may come our way.
LHC trackingKaltchev(1)With field errors in the IR1 (ATLAS) and IR5 (CMS) triplet quadrupoles, triplet correctors and coupling correctors; (2)with low order errors, orbit correction and beta-star correction (at the IP). Uses LHC@home. Tune scan.
Coherent Beam-Beam in LHCJonesUsing ACCSIM and HFM. Needs access to a massively-parallel system in Europe, and will likely also utilize Westgrid's facilities.
b-Beam neutrino factory study (CERN/Eurisol)Jones, BaartmanGeneral layout, simulations of the decay ring (6He2+6Li3+)

Academic

ActivityPeopleDescription
Lepton and Hadron Acceleration in FFAGsKoscielniak, CraddockDesign of 2.5-20 GeV FFAG accelerators for a muon collider or neutrino factory, and initial plans for a 10-20 MeV electron demonstration model of such machines. Application for NSERC special grant (30k$/yr for 3 yrs).
LieMathKaltchevNew technique of using Lie algebraic methods and Mathematica to calculate high order maps.
Fringe Field EffectsBaartmanDeveloping simpler calculational techniques based in Canonical transformations. (old talk)
Space Charge Code BenchmarkingJonesA collaboration of accelerator physicists has been formed to compare, benchmark, and validate codes for simulation of space-charge effects in synchrotrons and storage rings. There are seven codes and laboratories involved. ACCSIM (TRIUMF), IMPACT (LBNL), MICROMAP (GSI), ORBIT (SNS), SIMBAD (BNL), SIMPSONS (KEK), and SYNERGIA (FNAL). The initiative is motivated by the need to raise confidence in predictions of beam loss and quality for mega-watt beam projects such as SNS and J-PARC, and to explain observations and possibly improve the performance of existing high-intensity machines.



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On 12 May 2006, 13:53.