Report from TTC Milano http agenda infn itconference

Report from TTC Milano http: //agenda. infn. it/conference. Other. Views. py? view=standard&conf. Id=3087 W. Weingarten / CERN SPL cavity working group 7 March 2011 revised version for SPL coordination meeting 29 March 2011 7 March 2011 SPL cavity WG 1

Highlights from TCC Milano: Timetable • • Opening Plenary WG-1 Operational Performance of Cavity and Cryomodule – – • Session 1: • Cavity Performance • Cryomodule Performances Session 2: • Data to expect from near-future large scale cavity/cryomodule systems • Low beta cavity performance and limitations WG-2 Design and Fabrication of Cavities and Cryomodules – Session 1: • Issues with large-scale production of Cavities/Cryomodules - Challenges and plans for XFEL, and ongoing efforts elsewhere • Infrastructure status and plans • Power couplers (Cleaning vs. performances, designs for high beam power) – Session 2: • • • WG-3 Open Discussion and Talks on SRF To – – • Pressure vessel certification and Cryomodule Design Low beta design issues for cavities and modules Session 1: • Surface Treatments, new Procedures • Recent Progress with Cavities Session 2: • Discussion Topics Closing Session 7 March 2011 SPL cavity WG 2

3 The TTC Member Institutes n n n n Armenia: CANDLE, Yerevan; Yerevan Physics Institute, Yer. Phl, Yerevan; Canada: TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics China: Institute for High Energy Physics, IHEP, Academia Sinica, Beijing; Tsinghua University, Beijing; Peking University France: CEA/DSM DAPNIA, CE-Saclay, Gif-sur-Yvette; Laboratoire de l'Accélérateur Linéaire, LAL, IN 2 P 3 -CNR Germany: Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung, BESSY, Berlin; Hahn-Meitner Institut, HMI, Berlin; Technische Universität Darmstadt; Universität Frankfurt am Main; GKSS-Forschungszentrum Geesthacht; Deutsches Elektronen-Synchrotron DESY in der Helmholtz-Gemeinschaft, Hamburg und Zeuthen; Universität Hamburg; Forschungszentrum Rossendorf; Universität Rostock; Bergische Universität-GH Wuppertal UK: CCLRC-Daresbury Laboratory / ASTe. C Department; Royal Holloway, University of London, RHUL / JAI: University College London, UCL; University of Oxford / JAI India: Raja Ramanna Centre of Advanced Technology RRCAT, Indore; Bhabha Atomic Research Centre BARC, Mumbai; Inter-University Accelerator Centre, IUAC & Delhi University, DU; Variable Energy Cyclotron Center VECC Italy: Laboratori Nazionali di Frascati, INFN, Frascati; Istituto Nazionale di Fisica Nucleare, INFN, Legnaro; Istituto Nazionale di Fisica Nucleare, INFN, Milan; Istituto Nazionale di Fisica Nucleare, INFN, Rome II; Sincrotrone Trieste n Japan: High Energy Accelerator Research Organisation, KEK n Poland: The Henryk Niewodniczanski Inst. of Nuclear Physics, Polish Academy of Sciences, Krakow; AGH -University of Science and Technology, Facultyof Physics and Applied Computer Science, Krakow ; The Andrzej Soltan Institute for Nuclear Studies –IPJ, Otwock-Swierk; Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw; Warsaw University, Department of Physics; TU Lodz, Department of Microelectronicsand Computer Science; Warsaw University of Technology, WUT, IS n Russia: Moscow Engineering and Physics Institute, MEPh. I, Moscow; Budker Institute for Nuclear Physics BINP, Novosibirsk; Institute for High Energy Physics IHEP, Protvino; Institute for Nuclear Research, INR, Russian Academy of Sciences, Moscow n Switzerland: European Center for Nuclear Research CERN n USA: Argonne National Laboratory, ANL, Argonne IL; Brookhaven National Laboratory, BNL; Fermi National Accelerator Laboratory, FNAL, Batavia IL; Cornell University, Ithaca NY; Jefferson Lab, Newport News VA; SLAC, ILC Division; Lawrence Berkeley National Laboratory, LBNL, Berkeley CA; Michigan State University (MSU); Spallation Neutron Source(SNS) n Others: Joint Institute for Nuclear Research, JINR, Dubna Two institutes, VECC and CERN, have just joined us. n 54 Institutes now from 13 countries

Highlights from TCC Milano: ESS 1 Duperrier: ESS Accelerator Design Update (ADU) 7 March 2011 SPL cavity WG 4

Highlights from TCC Milano: 7 March 2011 SPL cavity WG ESS 2 5

Highlights from TCC Milano: XFEL • Technical specification is public • Cavity contracts to RI and Zanon 25 M€ for 300 cavities each, option for 800 cavities • No performance guarantee • Degradation of cryomodule observed 23. 6 (goal) -> 16 MV/m • 7 weeks needed per assembly of cryo-module • Vertical tests with He tank 7 March 2011 SPL cavity WG 6

The European XFEL - Progress and Status Civil Construction TTC Meeting, Milano, February 28 to March 3, 2011 Hans Weise, DESY

The European XFEL - Progress and Status RF Measurement and Field Flatness Tuning using DESY-provided Tools n. Both machines ready to be used at the companies (CE certified). n. Machines can be operated basically by Non-RF-Experts. n. Considerably shorter measurement / tuning time. n. Automation and documentation guaranteed. TTC Meeting, Milano, February 28 to March 3, 2011 Hans Weise, DESY

Module Test Results: PXFEL 1 (1) PXFEL 1 module was installed in the FLASH linac. 9 Denis Kostin, MHF-SL, DESY. TESLA Technology Collaboration (TTC) Meeting, February 28 - March 3 2011, Milano, Italy

Module Test Results: PXFEL 2 (1) PXFEL 2 module was diassembled and reassembled. 10 Denis Kostin, MHF-SL, DESY. TESLA Technology Collaboration (TTC) Meeting, February 28 - March 3 2011, Milano, Italy

Highlights from TCC Milano: Ko. RIA Hong & Park: The Ko. RIA project Korea Rare Isotope Accelerator Multipurpose, heavy-ion accelerator for basic science research 7 March 2011 SPL cavity WG 11

SC Cavity for IFF SC Linac [S. K. Ko, KAPRA] QWR-2 QWR-1 1 m (Quarter-Wave Resonator) HWR-1 (Half-Wave Resonator) HWR-2 Beam axis βG = 0. 041, fres= 70 MHz βG = 0. 085, fres= 70 MHz βG = 0. 285, fres= 280 MHz βG = 0. 53, fres= 280 MHz

Highlights from TCC Milano: News from other meetings HOM workshop Cornell http: //www. lepp. cornell. edu/Events/HOM 10/Agenda. html 7 March 2011 SPL cavity WG 14

From Closeout Discussion: Antenna / Loop Couplers Power Improvement needed Feedthrough, Geometry Transmission line needs improvement Goal 6 x fundamental 100 W 1 k. W Monopole: 1 e 3 (100 for single-cell); Dipole: 1 e 5 (100 for single-cell); For Quads: improve cell to cell Quadrupole: 1 e 9 (quads – limited by coupling, cell geometry, reduce Q-factors field in end-cells) number of cells, fluted tube (KEK) Quads: 1 e 8 – 1 e 5 15 MV/m (KEK); 20 MV/m (mod. TTF); > Coupler design, Feedthrough Eacc (CW) 38 MV/m (CEBAF) thermal conductivity Filling Factor good Cleaning No problem (demonstrated by TTF) Sensitive to tuning; Sensitive to MP & FE Mechanical issue bombardment; Feedthrough issues Use high-pass filter for tuning Thermal Low cryogenic load Long term reliability good (TTF, HERA); poor (SNS) 25 k. EUR (5 loop couplers including LHe Cost cooling) Coupler kicks Must symmetrize losses in transmission cable at higher HOM powers -> heating of antenna and Other issues feed through? Matthias Liepe, TTC Meeting, February 28 -March 3 2011, Milano, Italy Slide 15 Antenna / Loop HOM Damper Parameter Current status Frequency range 3 x fundamental

Highlights from TCC Milano: News from other meetings Thin Film Workshop INFN Legnaro University Padova http: //surfacetreatments. it/thinfilms/ 7 March 2011 SPL cavity WG 16

Dedicated Nb. HIPIMS chamber under construction @ Berkeley

7. 5 GHz Sapphire loaded TE 011 Nb cavity

Highlights from TCC Milano: News from other meetings Large Grain Workshop Jefferson Lab http: //conferences. jlab. org/sstin/program. html 7 March 2011 SPL cavity WG 21

Highlights from TCC Milano: News from other meetings 7 March 2011 SPL cavity WG 22

Highlights from TCC Milano: News from other meetings 7 March 2011 SPL cavity WG 23

Highlights from TCC Milano: JLAB 1 7 March 2011 SPL cavity WG 24

Highlights from TCC Milano: JLAB 2 7 March 2011 SPL cavity WG 25

Highlights from TCC Milano: 7 March 2011 SPL cavity WG JLAB 3 26

Highlights from TCC Milano: FNAL • automatic cavity inspection system (avoids long time required for manual inspection) • up till 10 tests per month • Horizontal test results within errors of vertical ones • “dressed” cavity EP developed • 35 MV/m @ 1. 2· 1010 7 March 2011 SPL cavity WG 27

Vertical / Horizontal Test • • Fermilab Have completed 9 horizontal tests of 1. 3 GHz 9 -cell cavities Some difficulty with field emission being addressed Procedurally limit to 35 MV/m in HTS Good agreement between vertical and horizontal test performance 28. Feb. 2011 Ginsburg (FNAL) TTC Mtg - Milano 28

Pressure vessel code issues • DESY (Matheisen) – Produce according to well documented experience, but no changes allowed – Test performed on “Prüfstück (test piece) – Manufacture n Cavities with notified body on place and do non destructive testing on them • Japan (Yamamoto) – PV = 0. 004 is the “magic” number – Special permission for Ti required • USA (Mammoser&Klebaner) – Superconducing RF cavites and cryomodules are subject to comply with pressure vessel, vacuum vessel, pressure piping and cryogenic system requirements of the Fermilab Environmental, Safety and Health Manual (FESHM) – Working group elaborated a code-consistent set of rules and added these as chapter into the FESHM; special procedures handle non-compliant items – Move the boundary to the vacuum vessel as Fermilab did 7 March 2011 SPL cavity WG 29

Collaboration Board • • • TTC memberships of both CERN and VECC was approved during the last CB 2010 Keeping the tradition of rotating chairs between Europe, North America, and Asia, the SC announces that from candidates in Europe the Committee recommends Dr. Olivier Napoly for the next Chair. . Dr. Olivier Napoly was thus elected to chair the TTC. The next TTC meeting will be co-hosted at Peking and Tsuinghua University on Dec. 5 -8, 2011 Intellectual property issues: “The mission of the TESLA Technology Collaboration. . . is to advance SCRF technology R & D and related accelerator studies across the broad diversity of scientific applications, and to keep open and provide a bridge for communication and sharing of ideas, developments, and testing across associated projects. ” Article 6 (2) of the Mo. U: Any commercial use of any such information shall be the subject of a separate agreement to be negotiated by the Members on a case-by-case basis The transfer of TESLA technology to industry is necessary for big projects, like XFEL, ILC and others, but always only to the advantage of science projects, so far. On the other hand, the application of the technology for industrial and/or medical purposes could happen in the coming years. In future meetings the CB should consider this matter and generally discuss it, taking a special care. Yoshishige Yamazaki hands over to Olivier Napoly. 7 March 2011 SPL cavity WG 30

Technical Board • Mo. U: “the Technical Board TB shall provide advice to the Collaboration on technical activities towards reaching the goals of the Collaboration Mission. To this end, the TB will – compile information on the technology activities in different technical areas, – provide findings and recommendations to the CB. ” • • Some activities of the TB and its members will be self-assigned while some will result from responses to requests from outside by leaders of the various projects which depend on superconducting RF. Members: – – – Cavity: P. Kneisel (JLAB), L. Lilje (DESY), D. Reschke (DESY), K. Saito (KEK), R. Laxdal (TRIUMF) Coupler: E. Kako (KEK), W. D. Moeller (DESY) Module: N. Ohuchi (KEK), C. Pagani (INFN), B. Petersen (DESY), T. Peterson (FNAL) Linac and Integration: H. Edwards (FNAL) , M. Champion, S. Michizono (KEK) new LLRF person needed! H. Weise (DESY) Chair Ex-Officio (per TTC Mo. U) Spokespersons of major test facilities • • • TTF / FLASH: S. Schreiber ILCTA-NM (old SMTF): S. Nagaitsev STF: H. Hayano – Guests 7 March 2011 SPL cavity WG 31

Topics of TB • Pressure vessel certification: – We wanted to hear information from all three regions. The topic became much more important with large series production. • Field emission: – Calibration procedure for existing Vertical Test Stands, i. e. a calibration source. • Overview about existing Cavity Preparation Infrastructure – goal: A two-step process should start • • first with a plane survey including all institutions, also universities. second (at the next meeting) to discuss strategies wrt. the beneficial use of distributed infrastructure. – TB charged a team: W. Weingarten, H. Hayano, J. Mammosser • Which data can TTC expect from the larger scale cavity/coupler/module production of e. g. XFEL? – Can one define standards for module tests • . . . 7 March 2011 SPL cavity WG 32