| Paper | Title | Page |
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TUPP053 |
Test of Electromechanical Actuators for SRF Cavity Tuners | |
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| SRF cavities required slow tuner. Major component of slow tuner is electromechanical actuator based stepper motor/gear system/spindle & nut. Failures of the electromechanical actuators made significant impact on operation of the linear accelerators. Fermilab is designing linear accelerator for PIP II. 325MHz and 650MHz SRF cavities, which designed to work at PIP II linac, have large stiffness. FNAL and Phytron developed electromechanical actuator based on stepper motor/gear system/shaft as a component for tuners to serve SRF cavities for PIP II linac. Results of the cold test of the actuators prototypes mounted on the SRF cavity presented. Review of reliabilities for available on the market electromechanical actuator presented. | ||
| THPP048 | Design of a Compact Lever Slow/Fast Tuner for 650 MHz Cavities for Project X | 957 |
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| Fermilab is developing 5-cell elliptical 650 MHz β=0.6 and β=0.9 cavities for Project X. A compact fast/slow lever tuner intended for both types of cavities has been developed for final tuning of the resonance frequency of the cavity after cooling down and to compensate the resonance frequency variations of the cavity during operation coming from liquid helium pressure fluctuations. The updated helium vessel (presented at this conference) is equipped with the tuner located at one of the end of the cavity. The tuner design and results of ANSYS analysis of their properties are presented. | ||
THPP052 |
RF Control and DAQ Systems for Upgraded Vertical Test Facility at Fermilab | |
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| Vertical Cavity Test Facility is major testing facility for extensive High Q0 SRF cavities R&D program at FNAL. Varieties of SRF cavities (325MHz, 650MHz, 1,3GHz and 3,9GHz ; bare and dressed) can be measured at VCTF. There are capabilities to cool-down cavities with slow & fast speed. Recently FNAL upgraded VCTF with two additional Vertical Test Stand (VTS2&3). Upgraded VCTF will be main R&D and production SRF cavities testing facility for new linear colliders (LCLS II and PIP II). We provide an overview of the design features, technical parameters and first operational experience of the newest RF control and DAQ systems, capable to serve three VTS (1,2&3). | ||
| THPP057 | Results of Cold Tests of the Fermilab SSR1 Cavities | 979 |
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| Fermilab is currently building the Project X Injector experiment (PXIE). The PXIE linac will accelerate a 1 mA H− beam up to 30 MeV and serve as a testbed for validation of Project X concepts and mitigation of technical risks. A cryomodule of eight superconducting RF Single Spoke Resonators of type 1 (SSR1) cavities operating at 325 MHz is an integral part of PXIE. Ten SSR1 cavities were manufactured in industry and delivered to Fermilab. We discuss tests of nine bare SSR1 cavities at the Fermilab Vertical Test Stand (VTS). Recently, one of the SSR1 cavities was welded inside a helium jacket. Results of the test of this cavity in the Fermilab Spoke Test Cryostat (STC) are shown. We report on the measured performance parameters of SSR1 cavities achieved during the tests. | ||