245 citations · 297 across the 29 of their papers we have counts for
29 papers
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…
First characterisation of the MAGO cavity, a superconducting RF detector for kHz-MHz gravitational waves
Lars Fischer, Bianca Giaccone, Ivan Gonin +12
Heterodyne detection using microwave cavities is a promising method for detecting high-frequency gravitational waves or ultralight axion dark matter. In this work, we report on stu…
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…
Millikelvin measurements of permittivity and loss tangent of lithium niobate
Silvia Zorzetti, Changqing Wang, Ivan Gonin +5
Lithium Niobate is an electro-optic material with many applications in microwave signal processing, communication, quantum sensing, and quantum computing. In this letter, we presen…
New Exclusion Limit for Dark Photons from an SRF Cavity-Based Search (Dark SRF)
A. Romanenko, R. Harnik, A. Grassellino +11
We conduct the first ``light-shining-through-wall" (LSW) search for dark photons using two state-of-the-art high quality-factor superconducting radio frequency (SRF) cavities and r…
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…
Design of axion and axion dark matter searches based on ultra high Q SRF cavities
Bianca Giaccone, Asher Berlin, Ivan Gonin +13
The Superconducting Quantum Materials and Systems center is developing searches for dark photons, axions and ALPs with the goal of improving upon the current state-of-the-art sensi…
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…