Design of a compact, cryogen-free superconducting solenoid for the electron lens of the Fermilab Integrable Optics Test Accelerator (IOTA). (31st March 2021)

• Record Type: Journal Article
• Authors: Dhuley, R.C.; Boffo, C.; Kashikhin, V.; Kolehmainen, A.; Perini, D.; Stancari, G.
• Is Part Of: Journal of instrumentation. Volume 16:Number 3(2021)
• Publication Date: 2021-03-31
• Subjects: Acceleration cavities and superconducting magnets (high-temperature superconductor -- radiation hardened magnets -- normal-conducting -- permanent magnet devices -- wigglers and undulators) -- Cryogenics and thermal models -- Accelerator Subsystems and Technologies -- Cryocoolers; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/16/03/T03009
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: The proposed electron lens for Fermilab's Integrable Optics Test Accelerator (IOTA) will broaden its capabilities by enabling new research in nonlinear integrable optics, space-charge compensation, proton beam cooling, and more. The electron lens is based on a 5–10 keV, 1–2 A electron beam, shaped using a 0.7 m long, 0.8 T solenoidal magnetic field. A cryogen-free superconducting solenoid has been designed to provide this solenoidal field, taking into consideration the constraints on space, utilities, and infrastructure in the IOTA experimental hall. The solenoid is made of copper stabilized niobium-titanium conductor, conduction-cooled using 4 K closed-cycle cryocoolers. This paper describes the overall design of the solenoid encompassing its mechanical construction, current leads optimization, cryogenic thermal modeling that provides estimates of cooldown time and static/dynamic heat loads, and quench analysis.