Accel. Physics - Todd Satogata
Previous two weeks (May 29-Jun 9) - ADMIN: Summer student start (Andrew's student) - IPAC18: SPC/2 meeting notes, invited talk followup - IPAC17: Last paper editing/QA - PERLE: Help Alex with web page setup - JLEIC: Crab discussions, integration meeting, ANL visit setup - USPAS: Director search committee, ODU Jan 2017 paperwork - OPS: Tour for HUGS group, TAC committe input for Hall D proposals - VACATION: Jun 6 Next two weeks (Jun 12-Jun 23) - JLEIC: Parameter/tech note documentation organization - JLEIC: Booster ramp parameters to Ed - JLEIC: Work on coasting beam instability tech note with Randy - ADMIN: Summer student advising (Andrew's student) - JLEIC: ANL ion source telecon (Jun 14) - ADMIN: Group meet (Jun 14) - ODU/USPAS: Prep talks for JMU workshop - TRAVEL: JMU Madison Accel Lab workshop (Jun 22-23)
Previous two weeks (May 29-Jun 9) - JINST article review - PERLE: Write up paper on PERLE optics, set up first meeting - USPAS: Work on lectures on "Practical Lattice Design" Next two weeks (Jun 12-Jun 23) - ADMIN: Talk on "Challenges and Opportunities of Energy Recovering Linacs" - VACATION: June 14-June 19, June 28-July 10 - PERLE: CERN visit (June 19-June 28) coincident with ERL workshop
Previous two weeks (May 29-Jun 9) - JLEIC: Tech note on LSC-induced longitudinal chirp in JLEIC coolers (TN-17-023) - JLEIC: Tech note on ion trapping in Cooler ERL/CCR (TN-17-024) - JLEIC: Tech note on initial kicker simulations (TN-17-026) - JLEIC: Started more careful kicker study using QWR model, exchange aperture - JLEIC: Start tech note on exchange region optimization - PERLE: Attend first meeting, kibitzing on CSR/uBI Next two weeks (Jun 12-Jun 23) - JLEIC: Complete note on exchange region optimization, redesign exchange region - JLEIC: More investigation of ion trapping, ion stability, clearing gaps - PERLE: CSR/uBI, lattice ruminations
Previous two weeks (May 29-Jun 9) - VACATION: May 29-Jun 2 - JLEIC: Complete collective effect study plan, present at R&D meet - JLEIC: Meets with Tim Michalski re impedance engineering Next two weeks (Jun 12-Jun 23) - JLEIC: Working through more details of coupled bunch instability (CBI) - JLEIC: Work with Sal Sosa to learn about APS CBI code clinchor - JLEIC: Calculate HOM contributions to transverse/longitudinal CBIs
Previous two weeks (May 29-Jun 9) - VACATION: May 30, Jun 6, Jun 7 (AM) - JLEIC: Initial chromaticity compensation, more Booster tracking - IPAC17: Prep, give portion of seminar on interesting talks from IPAC17 Next two weeks (Jun 12-Jun 23) - JLEIC: Refine chromaticity compensation - JLEIC: Obtain/document ramping parameters for Booster - JLEIC: Start ramping sections of Booster cycle
Previous two weeks (May 29-Jun 9) - JLEIC: Electron cooler work (pushing 3nC distribution) - ADMIN: Talk prep for ERL17 workshop (LERF; CSR/uBI at JLab ERLs) Next two weeks (Jun 12-Jun 23) - JLEIC: Electron cooler work (continue pushing 3nC distribution) - ADMIN: Talk prep for ERL17 workshop (LERF; CSR/uBI at JLab ERLs) - PERLE: Attend first meeting, kibitzing on CSR/uBI, start studies? - TRAVEL: ERL17 workshop (Jun 18-Jun 23)
Previous two weeks (May 29-Jun 9) - JLEIC: Coasting beam instability calculations/simulations - Dissertation writing: Continue coasting beam chapter, tech note Next two weeks (Jun 12-Jun 23) - JLEIC: Continue coasting beam instability calculations/simulations - Dissertation writing: Continue coasting beam chapter, tech note
Accel R&D - Yuhong Zhang
- Completed the optics of the electron collider ring by replacing the thin-lens trombones using the real quadrupoles, and presented in the bi-weekly nonlinear beam dynamics meeting.
- Working on testing a hybrid multi bend achromat lattice for the electron collider ring.
- Working on benchmarking of simulations in SLICK/SLICKTRACK and ZGOUBI.
- Miscellaneous: attended the bi-weekly non-linear beam dynamics meeting, attended the JLEIC simulation meeting, attended JLEIC weekly R&D meetings, attended the JLEIC detector user meeting, attended the JLEIC
- General meeting, attended the ion integration meeting.
- Preparation of JLEIC R&D plan
- Geometry tagging LDRD: teleconference with collaborators, data analysis, work with James
- Ion polarization: teleconference with Anatoliy's group, editing refereed IPAC'17 paper
- Nonlinear dynamics: teleconference with SLAC, editing Guohui's journal paper
- Detector background simulations: contributing to a generic detector R&D proposal
- Miscellaneous: seminar committee, muon cooling, simulations, parameter coordination, detector, IMP data analysis, crab crossing
- Verified "quiet" beam for magnetized beam matched to a solenoid; beam distribution follows the field lines in both straight and bent solenoids, and does not rotate in transverse plane for uniform longitudinal magnetic field. Analyzing beam distributions at entrance and exit of bent solenoid while mostly ignoring motion inside bent solenoid section for low energy beam. Nonzero transverse fields result in "cusp" motion in the plane of the bend as seen in other bent solenoid simulations.
- Investigating loss of parametric resonant behavior in the Skew PIC coupled optics case in the presence of RF. Checking for similar behavior in the uncoupled case to isolate sources of resonance detuning.
- Participated in joint seminar on IPAC'17 highlights and impressions.
- Invited to participate in DOE/SC review of Mu2E project at Fermilab as part of the accelerator physics subcommittee. Review is scheduled for July 25-27.
- Acceptance simulate study of ePb collision in JLEIC ion forward detection. The acceptance with 8T and 6T of FFQ strengths are studied
- DA with combining of FFQ multipoles and detector solenoid for the JLEIC ion collider ring.
- Writing A journal paper of "Integration of the full-acceptance detector at the JLEIC"
- Participated and support FOA
- Started the planning/coordination of bunched beam cooling experiment data
- JLEIC conceptual studies (DC cooling, bunched beam cooling, crab waist, etc.)
- Started preparation slides for a talk at EIC User Group Meeting on July 18 to 22.
- Invited to join an international organization committee for an ICFA beam dynamics mini-workshop (topic: DA), and participated discussions on invited presentations
Computational Physics - Yves Roblin
Diagonostic Development - Kevin Jordan
- Isotope temperature anomalies; built & ran mock-up in attempt to understand results from prior run. I also presented data to team.
- IBIC 2017 - working on selecting contributed talks
- Gun Test Stand; helping getting harp operational & getting optical spectra of BNNT flag material from Ocean Optics Spectrometer
- Inspected mirror from 3C12 - talked with Beryllium supplier about replacement ~$2k but it would have Nickel surface
- This week I worked on the following:
- -Collection optics for the spectrometer. Designed, built and installed – GTS BN test
- -Two new viewer cameras. Designed built one assembly, the second is being 3D printed – GTS
- -Some isotope production work and meeting
- -Getting the Lab 4 laser back operational – sent a computer to Erik to rebuild
- I've been looking over diagnostic issues that might be useful, like SR viewers for the 2T06 common dipole and mirror damage issues for the CEBAF accelerator diagnostics. The whole topic of optical BPMs seems like something we should be able to exploit for low-current applications. Direct X-ray imaging is another potentially fascinating way to obtain significant improvement in resolution with SR in CEBAF.
- I examined the proposals for Hall B experiments submitted to PAC45 and participated in the Technical Advisory Committee meeting last Monday.
- With Brandi Cade from Ops, we spent some time preparing for the BONuS12 ERR. As part of this, I revisited the 11 GeV beam envelope for CLAS12, checking once more to verify that all of the installed quadrupoles can provide the required BDL values for beam energies up to the ~11 GeV highest energy for Hall B. The answer is, "Yes." Along with this, I've been re-examining the effect of the unphysically short magnetic field length of the BL dipoles in the injection chicane upstream from the North Linac.
- I've also been trying to identify things to tell the CLAS12 Collaboration meeting next week in the "Accelerator Update."
- I'm still also trying to collect the appropriate materials for our diagnostics team meeting on harp data issues and related maintenance requirements.