We describe a simple and reliable clamp/release system for the rotor of large superconducting magnetic bearings. The system was developed for a cryogenic half-wave plate spinner for cosmic microwave background polarimetry but can have other applications. The main features of this system are its large rotor mass compliance (similar to 10 kg); zero power dissipation while holding the rotor and zero power dissipation when the rotor is released; fast (similar to 40 ms), balanced release and clamp actions, and lowpower dissipation (similar to 30 J) on the cold stage during each operation; low cost; and high reliability over a very large number of operation cycles. Published by AIP Publishing.

A clamp and release system for superconducting magnetic bearings / Columbro, Fabio; de Bernardis, Paolo; Masi, Silvia. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - 89:12(2018), p. 125004. [10.1063/1.5035332]

A clamp and release system for superconducting magnetic bearings

Columbro, Fabio
;
de Bernardis, Paolo;Masi, Silvia
2018

Abstract

We describe a simple and reliable clamp/release system for the rotor of large superconducting magnetic bearings. The system was developed for a cryogenic half-wave plate spinner for cosmic microwave background polarimetry but can have other applications. The main features of this system are its large rotor mass compliance (similar to 10 kg); zero power dissipation while holding the rotor and zero power dissipation when the rotor is released; fast (similar to 40 ms), balanced release and clamp actions, and lowpower dissipation (similar to 30 J) on the cold stage during each operation; low cost; and high reliability over a very large number of operation cycles. Published by AIP Publishing.
2018
superconductivity, cosmic microwave background, polarization modulators
01 Pubblicazione su rivista::01a Articolo in rivista
A clamp and release system for superconducting magnetic bearings / Columbro, Fabio; de Bernardis, Paolo; Masi, Silvia. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - 89:12(2018), p. 125004. [10.1063/1.5035332]
File allegati a questo prodotto
File Dimensione Formato  
Columbro_A clamp and release_2018.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 3.23 MB
Formato Adobe PDF
3.23 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1216073
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 14
social impact