J. Theilacker
YOU?
Author Swipe
View article: Operational Experience of the NML Cryogenic Plant at the FAST Test Facility
Operational Experience of the NML Cryogenic Plant at the FAST Test Facility Open
The NML cryogenic plant cools two individually cryostated superconducting radio frequency (SRF) capture cavities and one prototype ILC cryomodule with eight SRF cavities. This complex accelerates electrons at 150 MeV for the Integrable Opt…
View article: SPY: a conceptual design study of a magnet system for a high-pressure gaseous TPC neutrino detector
SPY: a conceptual design study of a magnet system for a high-pressure gaseous TPC neutrino detector Open
We present a novel conceptual design for a magnet system that provides the magnetic field necessary for the analysis of tracks in a high-pressure gaseous argon TPC while simultaneously serving as a pressure vessel to contain the TPC gas vo…
View article: Conservation of Helium while Maintaining High System Purity
Conservation of Helium while Maintaining High System Purity Open
Recent helium shortages and helium price increases have lead to an increased emphasis being placed on conserving helium. The need to conserve helium must be balanced with need to maintain the high levels of purity necessary to prevent oper…
View article: SPY: A Magnet System for a High-pressure Gaseous TPC Neutrino Detector
SPY: A Magnet System for a High-pressure Gaseous TPC Neutrino Detector Open
We present a novel conceptual design for a magnet system that provides the magnetic field necessary for the analysis of tracks in a high-pressure gaseous argon TPC while simultaneously serving as a pressure vessel to contain the TPC gas vo…
View article: Conservation of Helium while Maintaining High System Purity
Conservation of Helium while Maintaining High System Purity Open
Recent helium shortages and helium price increases have lead to an increased emphasis being placed on conserving helium. The need to conserve helium must be balanced with need to maintain the high levels of purity necessary to prevent oper…
View article: Conservation of Helium while Maintaining High System Purity
Conservation of Helium while Maintaining High System Purity Open
Recent helium shortages and helium price increases have lead to an increased emphasis being placed on conserving helium. The need to conserve helium must be balanced with need to maintain the high levels of purity necessary to prevent oper…
View article: Cryogenic and safety design of the future High Field Cable Test Facility at Fermilab
Cryogenic and safety design of the future High Field Cable Test Facility at Fermilab Open
to test high-field superconducting magnet models and demonstrators, including hybrid magnets, produced by the US Magnet Development Program (MDP). The paper describes the status of the facility, including construction, cryostat designs, to…
View article: Cryogenic User Facilities for R&D on Noble Liquid Detectors and Low Temperature Devices
Cryogenic User Facilities for R&D on Noble Liquid Detectors and Low Temperature Devices Open
Cryogenic test facilities are critical infrastructure for physics experiments in a variety of fields, perhaps most notably for particle detection with noble liquid detectors, low-temperature device development, and quantum information rese…
View article: Commissioning and early operating experience with the Fermilab horizontal test facility
Commissioning and early operating experience with the Fermilab horizontal test facility Open
Fermilab has constructed a facility for testing dressed superconducting radiofrequency (RF) cavities at 1.8 K with high-power pulsed RF. This test stand was designed to test both 9-cell 1.3 GHz TESLA-style cavities and 9-cell 3.9 GHz cavit…
View article: Operational Experience from LCLS-II Cryomodule Testing
Operational Experience from LCLS-II Cryomodule Testing Open
This paper describes the initial operational experience gained from testing Linac Coherent Light Source II (LCLS-II) cryomodules at Fermilab’s Cryomodule Test Facility (CMTF). Strategies for a controlled slow cooldown to 100 K and a fast c…
View article: Design considerations for a large aperture high field superconducting dipole
Design considerations for a large aperture high field superconducting dipole Open
The final phase of the Fermilab upgrade proposal calls for a new ring of superconducting magnets to be placed in the existing Main Accelerator tunnel. The goal of this design study is to specify a high field dipole (HFD) that is capable of…
View article: Fermilab Tevatron Transfer Line
Fermilab Tevatron Transfer Line Open
The Tevatron transfer line consists of twenty-five 250 meter sections interconnected with vacuum jacketed U-tubes forming a loop. Each section contains a 4.50 cm i.d. supercritical He line and a subcooled liquid $N_2$ shield with an expans…
View article: Fermilab Tevatron Five Refrigerator System Tests
Fermilab Tevatron Five Refrigerator System Tests Open
During the latter half of 1980 the Fermi Lab test program switched from stand alone refrigerator tests to a "Mini" system test, which now consists of two compressor buildings with 4 - two stage units each (final configuration is six buildi…
View article: Cryogenic system for the Tevatron
Cryogenic system for the Tevatron Open
Supporting the world`s highest energy proton/antiproton collider in high energy physics research, the Fermilab Tevatron cryogenic system consists of a hybrid system of a Central Helium Liquefier feeding twenty-four 1 kW satellite refrigera…
View article: Design of the cryostat for High Field Vertical Magnet Testing Facility at Fermilab
Design of the cryostat for High Field Vertical Magnet Testing Facility at Fermilab Open
design of the magnetic shielding and measurement of the remanent magnetic field inside the shielding are described.
View article: Conceptual Design of DUNE Near Detector Superconducting Magnet System
Conceptual Design of DUNE Near Detector Superconducting Magnet System Open
The Deep Underground Neutrino Experiment (DUNE) has formed a near detector design group (NDDG) tasked with delivering a CDR by the end of 2019. The DUNE Near Detectors will be housed in an underground hall on the Fermilab site. The two mai…
View article: The dynamic synthesis time-lag control for the 1.3 GHz LCLS-II Cryomodule test at Fermilab
The dynamic synthesis time-lag control for the 1.3 GHz LCLS-II Cryomodule test at Fermilab Open
The 1.3GHz LCLS-II Cryomodule (CM) has 8 cavities and each cavity has 9 RF cells and 80W heater. The 1.3GHz LCLS-II CM is 12.2-meter-long and contains a total 241.3 liters (equivalent liquid) of liquid helium, which is filling up by the 4K…
View article: Status of the LCLS-II Cryogenic Distribution System
Status of the LCLS-II Cryogenic Distribution System Open
The LINAC Coherent Light Source II (LCLS-II) located at SLAC National Accelerator Laboratory (SLAC) in Menlo Park, CA, is a U.S. Department of Energy project tasked to design and build a world-class x-ray free-electron laser facility for s…
View article: Overview of LCLS-II Project Status at Fermilab
Overview of LCLS-II Project Status at Fermilab Open
The superconducting RF Continuous-Wave (CW) Linac for the LCLS-II consists of thirty-five 1.3 GHz and two 3.9 GHz cryomodules that Fermilab and Jefferson Lab are jointly producing in collaboration with SLAC. Fermilab¿s scope of work is to …
View article: Passive Microphonics Mitigation during LCLS-II Cryomodule Testing at Fermilab
Passive Microphonics Mitigation during LCLS-II Cryomodule Testing at Fermilab Open
The LCLS-II project calls for cryomodule production and testing at both Fermilab and JLab. Due to low beam loading and high cavity quality factor, the designed peak detuning specification is 10 Hz. Initial testing showed peak detuning up t…
View article: Operational experience from LCLS-II cryomodule testing
Operational experience from LCLS-II cryomodule testing Open
This paper describes the initial operational experience gained from testing Linac Coherent Light Source II (LCLS-II) cryomodules at Fermilab's Cryomodule Test Facility (CMTF). Strategies for a controlled slow cooldown to 100 K and a fast c…
View article: Effects of thermal acoustic oscillations on LCLS-II cryomodule testing
Effects of thermal acoustic oscillations on LCLS-II cryomodule testing Open
Thermoacoustic Oscillations (TAOs) is a commonly experienced phenomenon in helium cryogenics and in most cases, is an undesirable effect. During LCLS-II prototype Cryomodule (pCM) testing, TAOs were observed in both the Cryogenics Distribu…
View article: LCLS-II 1.3 GHz cryomodule design - lessons learned from testing at Fermilab
LCLS-II 1.3 GHz cryomodule design - lessons learned from testing at Fermilab Open
Fermilab's 1.3 GHz prototype cryomodule for the Linac Coherent Light Source Upgrade (LCLS-II) has been tested at Fermilab's Cryomodule Test Facility (CMTF). Aspects of the cryomodule design have been studied and tested. The cooldown circui…
View article: Increasing the Energy of the Fermilab Tevatron Accelerator
Increasing the Energy of the Fermilab Tevatron Accelerator Open
The superconducting Tevatron accelerator at Fermilab has reached its eleventh year of operation since being commissioned in 1983. Last summer, four significant upgrades to the cryogenic system became operational which allow Tevatron operat…
View article: Design, Project Execution, and Commissioning of the 1.8 K Superfluid Helium Refrigeration System for SRF Cryomodule Testing
Design, Project Execution, and Commissioning of the 1.8 K Superfluid Helium Refrigeration System for SRF Cryomodule Testing Open
The Fermilab Cryomodule Test Facility (CMTF) provides a test bed to measure the performance of superconducting radiofrequency (SRF) cryomodules (CM). These SRF components form the basic building blocks of future high intensity accelerators…