J. Makara
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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: Optimization of static heat loads of the PIP-II cryomodules based on prototype HB650 cryomodule test results
Optimization of static heat loads of the PIP-II cryomodules based on prototype HB650 cryomodule test results Open
During the first cool down of the prototype HB650 cryomodule (pHB650 CM), high static heat loads have been measured compared to the estimation. Several analysis and calculations have been performed to explain this difference which led to c…
View article: PIP-II High Beta 650 Prototype Cryomodule Assembly Experience and Related Design Optimization
PIP-II High Beta 650 Prototype Cryomodule Assembly Experience and Related Design Optimization Open
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 have arisen from the transport of the cryomodule. While measur…
View article: Performance of PIP-II High-beta 650 Cryomodule After Transatlantic Shipping
Performance of PIP-II High-beta 650 Cryomodule After Transatlantic Shipping Open
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 have arisen from the transport of the cryomodule. While measur…
View article: Installation, commissioning, and testing of the HB650 CM at PIP2IT
Installation, commissioning, and testing of the HB650 CM at PIP2IT Open
The Proton Improvement Plan-II (PIP-II) is a major upgrade to the Fermilab accelerator complex, featuring a new 800-MeV Superconducting Radio-Frequency (SRF) linear accelerator (LINAC) powering the accelerator complex to provide the world’…
View article: Design of Muon Campus full flow purifier for varying operational conditions and horizontal shipping
Design of Muon Campus full flow purifier for varying operational conditions and horizontal shipping Open
Constant ingress of impurities in Muon Campus g-2 experiment at Fermilab has resulted in reduction of efficiency of cryogenic expanders and occasional undesired downtime to flush the impurities. Due to insufficiency of current 0.06 kg/s mo…
View article: Nitrogen precooling heat exchanger replacement and control system upgrade in superfluid cryoplant at CMTF
Nitrogen precooling heat exchanger replacement and control system upgrade in superfluid cryoplant at CMTF Open
Liquid nitrogen precooling is used in most cryoplants to achieve cooldown to 80 K temperature range. In one such system at Fermilab’s CMTF superfluid cryoplant, where the helium supply directly exchanges heat with liquid nitrogen, freezing…
View article: Nitrogen Precooling Heat Exchanger replacement and control system upgrade in Superfluid Cryoplant at CMTF
Nitrogen Precooling Heat Exchanger replacement and control system upgrade in Superfluid Cryoplant at CMTF Open
Liquid Nitrogen precooling is used in most Cryoplants to achieve cooldown to 80 K temperature range. In one such system at Fermilab's CMTF Superfluid Cryoplant, where the Helium supply directly exchanges heat with liquid Nitrogen, freezing…
View article: Design of Muon Campus full flow purifier for varying operational conditions and horizontal shipping
Design of Muon Campus full flow purifier for varying operational conditions and horizontal shipping Open
Constant ingress of impurities in Muon Campus g-2 experiment at Fermilab has resulted in reduction of efficiency of cryogenic expanders and occasional undesired downtime to flush the impurities. Due to insufficiency of current 60 g/s mobil…
View article: Installation, commissioning, and testing of the HB650 CM at PIP2IT
Installation, commissioning, and testing of the HB650 CM at PIP2IT Open
The Proton Improvement Plan-II (PIP-II) is a major upgrade to the Fermilab accelerator complex, featuring a new 800-MeV Superconducting Radio-Frequency (SRF) linear accelerator (LINAC) powering the accelerator complex to provide the world'…
View article: The Fermilab SSR1 and HB650 Synoptic and EPICS remote cryogenic control system
The Fermilab SSR1 and HB650 Synoptic and EPICS remote cryogenic control system Open
The 325MHz Single Spoke Resonator 1 (SSR1) Cryomodule (CM) has a 5.3-meter length, and it has 288-liter liquid helium @ 4.5K mode. The High Beta 650 MHz (HB650) CM contains six elliptical cavity cryomodules, has a 9.9-meter overall length …
View article: Nitrogen Precooling Heat Exchanger replacement and control system upgrade in Superfluid Cryoplant at CMTF
Nitrogen Precooling Heat Exchanger replacement and control system upgrade in Superfluid Cryoplant at CMTF Open
The control system was updated to bypass the heat exchanger entirely if the incoming Helium stream temperature drops below 76 K. This was done by repurposing two control valves as heat exchanger bypass valves that were previously used for …
View article: The Fermilab SSR1 and HB650 Synoptic/EPICS remote cryogenic control system
The Fermilab SSR1 and HB650 Synoptic/EPICS remote cryogenic control system Open
PLC, Synoptic and Fermilab ACNET HMI are the ideal choices as the MC g-2 cryogenic distribution real-time and on-Line remote control system. This paper presents a method which has been successfully used by many Fermilab distribution cryoge…
View article: Installation, commissioning, and testing of the HB650 CM at PIP2IT
Installation, commissioning, and testing of the HB650 CM at PIP2IT Open
present results of testing of the prototype HB650 cavity in upgraded STC facility. We characterize cavity performance and qualify it for the prototype HB650 cryomodule assembly.
View article: Design of Muon Campus Full Flow Purifier for Varying Operational Conditions and Horizontal Shipping
Design of Muon Campus Full Flow Purifier for Varying Operational Conditions and Horizontal Shipping Open
The Muon Campus g-2 experiment requires stable helium supply at 5 K to the superconducting magnet. After a short period of operations, the pressure drop across the magnet’s flow supply valve increases due to impurities, resulting in reduce…
View article: High gradient performance and quench behavior of a verification cryomodule for a high energy continuous wave linear accelerator
High gradient performance and quench behavior of a verification cryomodule for a high energy continuous wave linear accelerator Open
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 nitrogen doping treatment to improve gradient performance. The …
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: 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: LCSL-II Cryomodule Testing at Fermilab
LCSL-II Cryomodule Testing at Fermilab Open
Cold powered testing of all LCLS-II production cryomodules at Fermilab is complete as of February 2021. A total of twenty-five tests on both 1.3 GHz and 3.9 GHz cryomodules were conducted over a nearly five year time span beginning in the …
View article: LCLS-II and He Cryomodule Microphonics at CMTF in Fermilab [Poster]
LCLS-II and He Cryomodule Microphonics at CMTF in Fermilab [Poster] Open
made to the cavity mechanical supports and Fermilab test stand to improve detuning performance. These modifications and testing results will be presented.
View article: LCLS-II-HE verification cryomodule high gradient performance and quench behavior
LCLS-II-HE verification cryomodule high gradient performance and quench behavior Open
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 nitrogen doping treatment to improve gradient performance. The …
View article: Fermilab Cryogenic Test Facilities
Fermilab Cryogenic Test Facilities Open
Fermi National Accelerator Laboratory (Fermilab) has multiple cryogenic test facilities, undertaking testing of superconducting magnets, Superconducting Radio Frequency (SRF) cavities, SRF cryomodules and other helium cryogenic components.…
View article: APS-TD Helium Cryogenic Facilities
APS-TD Helium Cryogenic Facilities Open
Cryogenic System: • CMTF cryogenic system is supplied by a state of the art Superfluid Cryogenic Plant to supply 40K, 5K, and 2K helium up to 500 W. 2K operations achievable through cold or warm compression systems. Currently Supports: • C…
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: High Gradient Performance in Fermilab ILC Cryomodule
High Gradient Performance in Fermilab ILC Cryomodule Open
Fermilab has assembled an ILC like cryomodule using U.S. processed high gradient cavities and achieved an average gradient of 31.5 MV/m for the entire cryomodule. Test results and challenges along the way will be discussed.
View article: First Beam and High-Gradient Cryomodule Commissioning Results of the Advanced Superconducting Test Accelerator at Fermilab
First Beam and High-Gradient Cryomodule Commissioning Results of the Advanced Superconducting Test Accelerator at Fermilab Open
The advanced superconducting test accelerator at Fermilab has accelerated electrons to 20 MeV and, separately, the International Linear Collider (ILC) style 8-cavity cryomodule has achieved the ILC performance milestone of 31.5 MV/m per ca…