245 citations · 297 across the 29 of their papers we have counts for
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Cold Test Results of Pre-Production PIP-II SSR2 Cavities with High-Power Couplers in the Fermilab Spoke Test Cryostat
A. Sukhanov, C. Contreras-Martinez, C. Grimm +13
As part of the PIP-II project at Fermilab, a pre-production cryomodule featuring 325 MHz Single Spoke Resonator type 2 (SSR2) superconducting RF cavities is under construction. The…
Gridded RF Gun Design for SRF Linac Applications
I. Gonin, C. Edwards, S. Kazakov +8
The thermionic gridded gun is described which generates short electron bunches for further acceleration in a Nb3Sn conduction cooled SRF linac. The gun is built into the first cavi…
Performance of PIP-II High-beta 650 Cryomodule After Transatlantic Shipping
J. Ozelis, M. Barba, J. Bernardini +27
After shipment to the Daresbury Lab and return to Fermilab, the prototype HB650 cryomodule underwent another phase of 2K RF testing to ascertain any performance issues that may hav…
Results of High Order Modes Spectra Measurements in 1.3 GHz Cavities for LCLS-II
A. Lunin, T. Khabiboulline, A. Sukhanov +1
Fermilab recently completed production and testing of 1.3 GHz cryomodules for the LCLS-II project. Each cryomodule consists of eight TESLA-shaped superconducting elliptical cavitie…
On forced RF generation of CW magnetrons for SRF accelerators
G. Kazakevich, R. P. Johnson, T. Khabiboulline +4
CW magnetrons, initially developed for industrial RF heaters, were suggested to power RF cavities of superconducting accelerators due to their higher efficiency and lower cost than…
Impact of Solenoid Induced Residual Magnetic Fields on The Prototype SSR1 CM Performance
D. Passarelli, J. Bernardini, C. Boffo +11
A prototype cryomodule containing eight Single Spoke Resonators type-1 (SSR1) operating at 325 MHz and four superconducting focusing lenses was successfully assembled, cold tested,…
Testing of the 2.6 GHz SRF Cavity Tuner for the Dark Photon Experiment at 2 K
C. Contreras-Martinez, B. Giaccone, I. Gonin +6
At FNAL two single cell 2.6 GHz SRF cavities are being used to search for dark photons, the experiment can be conducted at 2 K or in a dilution refrigerator. Precise frequency tuni…
Development of 3-cell Traveling Wave SRF Cavity
F. Furuta, V. Yakovlev, T. Khabiboulline +3
Traveling wave SRF cavity is a new technology and requires a multi-stage process for development. Conceptual designs have been proposed to adopt TW resonance in an SRF cavity The e…
The Evaluation of Mechanical Properties of LB650 Cavities
J. Holzbauer, G. Wu, H. Park +13
The PIP-II project's LB650 cavities could potentially be vulnerable to mechanical deformation because of the geometric shape of the cavity due to reduced beta. The mechanical prope…
Tests Of The Extended Range SRF Cavity Tuners For The LCLS-II-HE Project*
C. Contreras-Martinez, T. Arkan, A. Cravatta +7
The LCLS-II HE superconducting linac can produce multi-energy beams by supporting multiple undulator lines simultaneously. This could be achieved by using the cavity SRF tuner in t…
Validation of the 650 MHZ SRF tuner on the low and high beta cavities for PIP-II at 2 K*
C. Contreras-Martinez, S. Chandrasekaran, S. Cheban +7
The PIP-II linac will include thirty-six beta=0.61 and twenty-four beta=0.92 650 MHz 5 cell elliptical SRF cavities. Each cavity will be equipped with a tuning system consisting of…
Tuning of Multicell Superconducting Accelerating Cavities using Pressurized Balloons
Mohamed H. Awida, Donato Passarelli, Marco Castellari +2
Plastic tuning of multicell superconducting accelerating cavities is crucial in the development cycle of cavities for particle accelerators. Cavities must meet stringent requiremen…
Measurement of high quality factor superconducting cavities in tesla-scale magnetic fields for dark matter searches
S. Posen, M. Checchin, O. S. Melnychuk +3
In dark matter searches using axion haloscopes, the search sensitivity depends on the quality factors () of radiofrequency cavities immersed in multi-tesla magnetic fields. In…
Design of a medium energy, high average power superconducting e-beam accelerator for environmental applications
R. C. Dhuley, I. Gonin, K. Zeller +10
We present the technical and engineering design of a medium energy (10 MeV) and high average power (1 MW) electron beam accelerator intended for irradiation treatment of high volum…
LCLS-II-HE verification cryomodule high gradient performance and quench behavior
S. Posen, A. Cravatta, M. Checchin +43
An 8-cavity, 1.3 GHz, LCLS-II-HE cryomodule was assembled and tested at Fermilab to verify performance before the start of production. Its cavities were processed with a novel nitr…
Stimulated Generation of Magnetrons powered below the Self-Excitation Threshold Voltage
G. Kazakevich, R. P. Johnson, T. Khabiboulline +3
Modern CW or pulsed superconducting accelerators of megawatts beams require efficient RF sources controllable in phase and power. It is desirable to have an individual RF power sou…
Commissioning And First Results From The Fermilab Cryomodule Test Stand
E. R. Harms, M. Awida, C. Baffes +34
A new test stand dedicated to Superconducting Radiofrequency (SRF) cryomodule testing, CMTS1, has been commissioned and is now in operation at Fermilab. The first device to be cool…
Initial Beam Dynamics Simulations of a High-Average-Current Field-Emission Electron Source in a Superconducting RadioFrequency Gun
O. Mohsen, I. Gonin, R. Kephart +5
High-power electron beams are sought-after tools in support to a wide array of societal applications. This paper investigates the production of high-power electron beams by combini…
Nitrogen and argon doping of niobium for superconducting radio frequency cavities: a pathway to highly efficient accelerating structures
A. Grassellino, A. Romanenko, O. Melnychuk +7
We report a surface treatment that systematically improves the quality factor of niobium radio frequency cavities beyond the expected limit for niobium. A combination of annealing…
High Gradient Tests of the Fermilab SSR1 Cavity
T. Khabiboulline, C. M. Ginsburg, I. Gonin +12
In Fermilab we are build and tested several superconducting Single Spoke Resonators (SSR1, β=0.22) which can be used for acceleration of low beta ions. Fist two cavities performed…
First high power pulsed tests of a dressed 325 MHz superconducting single spoke resonator at Fermilab
R. Madrak, J. Branlard, B. Chase +18
In the recently commissioned superconducting RF cavity test facility at Fermilab (SCTF), a 325 MHz, β=0.22 superconducting single-spoke resonator (SSR1) has been tested for the fir…
CW RF system of the Project-X accelerator front end
T. Khabiboulline, S. Barbanotti, I. Gonin +3
Front end of a CW linac of the Project X contains an H source, an RFQ, a medium energy transport line with the beam chopper, and a SC low-beta linac that accelerates H- from 2.5 Me…
First high gradient test results of a dressed 325 MHz superconducting single spoke resonator at Fermilab
R. C. Webber, T. Khabiboulline, R. Madrak +4
A new superconducting RF cavity test facility has been commissioned at Fermilab in conjunction with first tests of a 325 MHz, β = 0.22 superconducting single-spoke cavity dressed w…
Experiences with the Fermilab HINS 325 MHz RFQ
R. C. Webber, T. Khabiboulline, R. Madrak +4
The Fermilab High Intensity Neutrino Source program has built and commissioned a pulsed 325 MHz RFQ. The RFQ has successfully accelerated a proton beam at the RFQ design RF power.…