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Oliver Kugeler

Oliver Kugeler. Progress of the installation of a quadrupole resonator for thin films testing at HZB. Overview. Purpose of the QPR: RF characterisation of superconducting thin films Activities at HZB to date : Setting up the infrastructure ( Scope of this talk ). Dedicated

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Oliver Kugeler

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  1. Oliver Kugeler Progress of the installation of a quadrupole resonator for thin films testing at HZB

  2. Overview • Purposeofthe QPR: • RF characterisationofsuperconductingthinfilms • Activitiesat HZB todate: • Setting uptheinfrastructure • (Scopeofthistalk)

  3. Dedicated Insert for QPR • Verticaltest stand • PresentlymanufacturedatKriosystems (Wroclaw, PL) • Tobeinstalled in late April 2014 • Magneticshielding, NoLN2precooling, • 400 literdewaroperation, 1.8 K

  4. HZB SRF infrastructureupgrade HoBiCaT GunlabBeamline Gun Vertical Test stand Integration intoHoBiCaTbunker UseCryogenics, RF infrastructure, InterlockingsystemfromHoBiCaT

  5. Pumpingports Couplerports • HZB Quadrupole resonator 1.8 K lHe Operating frequencies: 433 / 866 / 1300 MHz (TESLA) Resonator body (Nb) Thickened quadrupolerods (Nb) Sample Coaxialgap Frame (SS, Ti) Calorimetrychamber (large domainNb)

  6. Design optimization • Fullparameterizationwith CST • Maximizingfiguresofmerit • (PhDwork Raphael Kleindienst) * fractionoffieldexposurebetween sample andresonator

  7. QPR manufactureatNiowave (Sep 2013) Large grain meterial

  8. QPR cleaning at JLAB • Cavityshippedto JLAB • BCP, HPR and First RF testsatJLAB throughBerlinPro MOU Weld protection Ultrasonicrinsing BCP Doneby Andrew Burrill

  9. Cavitypreparation 600°C bakeoutfor 12 hours PhotosbyAndrew Burrill Leak check in He atmosphere

  10. First RF tests • Passbandspectrummeasuredwithnetworkanalyzer; looks okay • Quadrupole mode off by 8 MHz (still withinamplifierbandwidth) 433 MHz 866 MHz Makeshiftloopantenna RF testingsetup 1.3 GHz PhotosbyAndrew Burrill

  11. LLRF andcalorimetry • 433 MHz RF componentsobtained • 433 MHz PLL built • Data acquisitionhardwaresetup • Temperaturecontrollerinstalled • Cernoxsensorsobtained • Heaterwithminimizedmagneticfieldbuilt • Magneticcoupler (loopantenna) built • DC coilformagneticmeasurementsbuilt

  12. Modifiedthermometrychamber (Master thesis Sebastian Keckert) Removable sample M2.5 Helicoil • Exploded view • Advantage: • reduced sample dimensions(Ø 75 mm, h=12 mm) • noweldingrequired • geometricaladjustmentofsample possible • Risk: • Cleanlinessissues (no separate vacua in cavityandcalorimetrychamber) Matching surfaces Double sided CF100 flange

  13. outlook • First coldtestat JLAB • Qualify QPR at HZB • Identifythin film producers / techniques / materials • Start measurements

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