Varian Associates

About: Varian Associates is a based out in . It is known for research contribution in the topics: Beam (structure) & Amplifier. The organization has 2160 authors who have published 2591 publications receiving 46002 citations.

Heat dissipation device

Abstract: A device is disclosed for use in dissipating heat from a heated object when restrictions on expansion of the heated object and the heat dissipation device cause stresses in the device, in any containing structures and in the bonds at the interfaces of the device with other structures The device is comprised of thin members which have been formed in a shape distorted from the lines normal to the surface of attachment of the members to the object The members surround and are in thermal contact with the heated object As the members and object expand and contract during temperature cycling, the members deform, allowing the heated object to move relative to surrounding structures, thus relieving stress When such movement is constrained, the members are thin enough to relieve stress by deformation into the space between the members A preferred embodiment of this device uses members which are shaped generally like a hollow truncated cone

Indirect detection of nuclear spins of low gyromagentic ratio coupled to spins of high gyromagnetic ratio

Abstract: In a heteronuclear system, the indirect detection of nuclei S, of weak gyromagnetic ratio, coupled to nuclei I, of strong gyromagnetic ratio, is accomplished by generation of zero and double quantum coherence between the I and S spin systems, during a preparatory period, t p . The zero and double quantum transitions are then interchanged at the midpoint of the evolution period, t 1 , producing an echo modulated only by S and I-I interactions at the end of the period t 1 , at which time the zero and double quantum coherence is then converted to I spin single quantum coherence yielding a free induction decay wave form S(t 2 ) for given t 1 . The period, t 1 , is then varied to obtain a two-dimensional function S(t 1 , t 2 ) which is then fully transformed to the frequency domain obtaining S(ω 1 , ω 2 ) whereby the chemical shift of the coupled S spin is obtained along the ω 1 axis and the chemical shift of the I spin is obtained along the ω 2 axis.

Rotatable vacuum flange.

Abstract: A rotatable vacuum flange includes a flange ring (10) having a recess (20), an insert (30) mounted in the recess (20) in the flange ring (10), the insert (30) including a seal portion (34) and being adapted for vacuum-tight attachment to a vacuum conduit (40), and a wire spring (50) positioned between the flange ring (10) and the insert (30). The wire spring (50) retains the insert (30) in the recess (20) in the flange ring (10) and permits rotation of the insert (30) relative to the flange ring (10). The flange ring (10) and the insert (30) include grooves (44) located in opposing alignment to receive the wire spring (50).