19 citations · 21 across the 15 of their papers we have counts for
15 papers
The Ponderomotive Effects of Narrow-band, Superconducting Resonators in Open and Closed Loop
Jacob Brown, Alexander Sukhanov, Crispin Contreras-Martinez +6
In this work, we present measurements of ponderomotive instabilities in narrow-band, coaxial resonators in open and closed control loop systems. We show an analytical scheme we wil…
Improved Dark Photon Sensitivity from the Dark SRF Experiment
Saarik Kalia, Zhen Liu, Bianca Giaccone +15
We report the refined dark-photon exclusion bound from Dark SRF's pathfinder run. Our new result is driven by improved theoretical modeling of frequency instability in high-quality…
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…
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…
PI Loop Resonance Control for Dark Photon Experiment at 2 K Using a 2.6 GHz SRF Cavity
C. Contreras-Martinez, B. Giaccone, O. Melnychuk +4
Two 2.6 GHz SRF cavities are being used for a dark photon search at the vertical test stand (VTS) in FNAL, for the second phase of the Dark SRF experiment. During testing at 2 K th…
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…
Review of the application piezoelectric actuators for SRF cavity tuners
Yuriy Pischalnikov, Crispin Contreras-Martinez
Modern particle accelerators and high-energy physics experiments that deployed up to several hundred of accelerating superconducting RF cavities require accurate frequency control.…
Phase-controlled improvement of photon lifetime in coupled superconducting cavities
Changqing Wang, Oleksandr S Melnychuk, Crispin Contreras-Martinez +9
High-quality cavities are crucial for various fundamental physical studies and applications. Here we find that by coupling two cavities directly or via a phase-tunable coupling cha…
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…
LCLS-II and HE Cryomodule Microphonics at CMTF in Fermilab*
C. Contreras-Martinez, E. Harms, C. Cravatta +7
Microphonics causes the cavity to detune. This study discusses the microphonics of sixteen 1.3 GHz cryomodules, 14 for LCLS-II and 2 for LCLS-II HE tested at CMTF. The peak detunin…
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…
Simulated Lorentz Force Detuning Compensation With A Double Lever Tuner On A Dressed ILC/1.3 GHZ Cavity At Room Temperature
C. Contreras-Martinez, Y. Pischalnikov, J. C. Yun
Pulsed SRF linacs with high accelerating gradients experience large frequency shifts caused by Lorentz force detuning (LFD). A piezoelectric actuator with a resonance control algor…
Accelerated Lifetime Test of The SRF Dressed Cavity/Tuner System for LCLS II HE Project
Y. Pischalnikov, T. Arkan, C. Contreras-Martinez +5
The off-frequency detune method is being considered for application in the LCLS-II-HE superconducting linac to produce multi-energy electron beams for supporting multiple undulator…
Searches for New Particles, Dark Matter, and Gravitational Waves with SRF Cavities
Asher Berlin, Sergey Belomestnykh, Diego Blas +33
This is a Snowmass white paper on the utility of existing and future superconducting cavities to probe fundamental physics. Superconducting radio frequency (SRF) cavity technology…
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…