The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2007
Filed:
Aug. 16, 2006
Thomas M. Barbara, Portland, OR (US);
Alexander M. J. Hudson, Palo Alto, CA (US);
Atholl A. V. Gibson, Walnut Creek, CA (US);
Thomas M. Barbara, Portland, OR (US);
Alexander M. J. Hudson, Palo Alto, CA (US);
Atholl A. V. Gibson, Walnut Creek, CA (US);
Varian Inc., Palo Alto, CA (US);
Abstract
The thermal performance and vacuum properties of a cryogenic NMR probe are improved when thermal control is implemented by conductive heat transfer to a cold head cooled by a heat exchanger to below the selected operating temperature. The heat load is manipulated by locating a heater to produce a more nearly constant heat load in conjunction with pulsed RF power and in one embodiment transferring such heater power through a common thermal path. In another embodiment, the heater power is conductively transferred directly to the heat exchanger.