A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

Deibele, C.

Paper Title Page
MOPD063 Experimental Study of the SNS MEBT Chopper Performance 831
 
  • A.V. Aleksandrov, C. Deibele
    ORNL, Oak Ridge, Tennessee
  
 

The chopper system for the Spallation Neutron Source (SNS) provides a gap in the beam for clean extraction from the accumulator ring. It consists of a pre-chopper in the low energy beam transport and a faster chopper in the medium energy beam transport (MEBT). It took several iterations to develop a working design with the required parameters. In this paper we describe the latest design of the MEBT chopper deflector and give results of the experimental verification of the chopper effectiveness, the gap cleanness and the rise time measured with high resolution using the SNS laser wire. The effect on the losses will be discussed as well.

  
WEPEB053 Experimental Tests of a Prototype System for Active Damping of the e-p Instability in the ORNL SNS Accumulator Ring 2809
 
  • R.A. Hardin
    ORNL RAD, Oak Ridge, Tennessee
  • V.V. Danilov, C. Deibele
    ORNL, Oak Ridge, Tennessee
  
 

The prototype of an analog transverse (vertical and horizontal) feedback system to actively damp the electron-proton (e-p) instability has been developed and tested on the ORNL Spallation Neutron Source (SNS). We will describe the principle components, system configuration, and review several experimental studies geared towards understanding the current performance and limitations of the system.