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Superconducting Undulator R&D Review
SLAC, LBNL, ANLJan. 31, 2014
07:00 AM (PST)Kings River Room (B052-306), SLACor “Go-To-Meeting” teleconference
SCU R&D Review, Jan. 31, 2014
Superconducting Undulator (SCU) Motivation
Using an SCU for the LCLS-II HXR undulator……allows full performance to 5 keV (SASE & self-seeded) and with 50-70 m less undulator (or more taper)…has orders of mag. less sensitivity to rad. dose…is much less sensitive to e- emittance (new high-rate gun)…produces very low pressure in a small vacuum chamber (gas scattering at 1 MHz)
Schematic of the LCLS-II facility with the new SCRF linac and two new undulators, along with the existing copper (Cu) linac, undulator and experimental halls. The “Cu Linac” is in the 3 rd km of the SLAC tunnel.
HXR FELSXR FEL
SCU R&D Review, Jan. 31, 2014
SCU R&D Plan in Brief
ANL…Build 2-m test cryostat (based on existing design at APS)Build & test 1.5-m long NbTi prototype planar undulator (lu = 21.0 mm)
LBNL…Build & test 1.5-m long Nb3Sn prototype planar undulator (lu = 18.5 mm)
Develop and apply shimming to each of the NbTi and Nb3Sn cold masses
Both Labs…Develop (refine) field measurement and field correction techniquesDemonstrate predicted field, field quality, end-field corrections, field measurement and tuning, cold mass fiducialization, and integration of cold mass into cryostat
Goal: Within 18 months deliver fully functional SC prototype undulator(s) which meet LCLS-II specifications
see presentations on Jan. 31
SCU R&D Review, Jan. 31, 2014
Review Committee and Charge
Name Institute E-Mail Address ConfirmedMikael Eriksson, chair Max Lab [email protected] Yes – 12/18/13Sara Casalbuoni ANKA [email protected] Yes – 12/18/13David Larbalestier FSU [email protected] Yes – 12/17/13Joachim Pflueger EXFEL [email protected] Yes – 12/18/13Johannes Bahrdt HZB [email protected] Yes – 01/08/14
Review Committee:
Charge to the Committee:1. Is the SCU R&D plan technically sound, and is it well enough defined in scope,
schedule, and cost so as to produce definitive results that can support a baseline design change to the hard x-ray LCLS-II undulator, by May 2015?
2. If the plan appears insufficient, what recommendations can the committee make to improve the chances for supporting a baseline change within 18 months?
3. What further alterations might be made to solidify the plan and move it forward in time or reduce costs?
SCU R&D Review, Jan. 31, 2014
DRAFT Agenda for Jan. 31 Review* (2014)
Review Agenda (all times Pacific/SLAC):07:00 AM (5 min) Welcome and Charge Norbert Holtkamp (SLAC)07:05 AM (30 min) SCU Advantages in LCLS-II Paul Emma (SLAC)07:35 AM (20 min) Undulator Tolerance Estimates Heinz-Dieter Nuhn (SLAC)07:55 AM (50 min) SCU Development at ANL Efim Gluskin (ANL)08:45 AM (10 min) (break) -08:55 AM (50 min) SCU Development at LBNL Soren Prestemon (LBNL)09:45 AM (20 min) SCU Field Measurements Diego Arbelaez (LBNL)10:05 AM (25 min) (executive session) Committee Only10:30 AM (adjourn) -
* Carried out by video conference to save travel.
Chairman assembles committee response in writing within 2 weeks (Feb. 14, 2014)
Meeting site at (no password needed):https://portal.slac.stanford.edu/sites/ad_public/reviews/scu_rd_jan_2014/
SCU R&D Review, Jan. 31, 2014
Tele-Conference Instructions
We will use Go-To-Meeting to connectYou don’t need any previous experienceBrief instructions will be sent before the meeting (see right side of this slide )These will download the software you needYou only need a computer (with monitor screen) and a telephone (cell OK)You can swap PC-mic/speakers for phoneCall P. Emma if trouble (+1 510 612-9033)
1. Please join my meeting.https://global.gotomeeting.com/meeting/join/298937589 2. Use your microphone and speakers (VoIP) - a headset is recommended. Or, call in using your telephone:
United States: +1 (213) 493-0619Germany: +49 (0) 811 8899 6925Sweden: +46 (0) 852 503 473
Access Code: 298-937-589Audio PIN: shown after joining the meeting. Meeting ID: 298-937-589
We will hold a connection test on Jan. 27 at 08:00 AM (Pacific Time) = 17:00 European Time, if you can attend. I will send a reminder on Jan. 23. You will simply click the blue link at right and dial the telephone (or use your PC microphone & speakers) as also listed at right. We will confirm that all of you can connect. It should be brief and easy. Note country-specific phone numbers (toll free from within country).
Note country phone numbers
