IPAC2013 - List of Authors (Liu, Y.)

Paper

Title

Page

Laser Wire Based Parallel Profile Scan of H⁻ Beam at the Superconducting Linac of Spallation Neutron Source

3090

Y. Liu, A.V. Aleksandrov, D.L. Brown, R. Dickson, C. Huang, C.D. Long
ORNL, Oak Ridge, Tennessee, USA
C.C. Peters
ORNL RAD, Oak Ridge, Tennessee, USA

Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725.
We report on the world’s first experiment of a parallel profile scan of the hydrogen ion (H⁻) beam using a laser wire system. The system was developed at the superconducting linac (SCL) of the Spallation Neutron Source (SNS) accelerator complex. The laser wire profile scanner is based on a photo-detachment process and therefore can be conducted on an operational H⁻ beam in a nonintrusive manner. The parallel profile scanning system makes it possible to simultaneously measure profiles of the 1-MW neutron production H⁻ beam at 9 different locations (corresponding to energy levels of 400 – 950 MeV) of the superconducting linac using a single light source. The entire measurement process takes less than 5 minutes to complete. Together with the hardware modification, we have also upgraded our user interface to visualize the 9-pairs of H⁻ beam profiles in a real-time fashion, which presents a highly intuitive and informative picture of the H⁻ beam propagation along the acceleration path. The laser wire based parallel profile scanning system provides a powerful tool for accelerator operators and physicists to study the SCL modelling, monitor and/or tune the beam parameters.

Slides THOAB101 [2.277 MB]

Paper	Title	Page
THOAB101	Laser Wire Based Parallel Profile Scan of H⁻ Beam at the Superconducting Linac of Spallation Neutron Source	3090
	Y. Liu, A.V. Aleksandrov, D.L. Brown, R. Dickson, C. Huang, C.D. Long ORNL, Oak Ridge, Tennessee, USA C.C. Peters ORNL RAD, Oak Ridge, Tennessee, USA
	Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725. We report on the world’s first experiment of a parallel profile scan of the hydrogen ion (H⁻) beam using a laser wire system. The system was developed at the superconducting linac (SCL) of the Spallation Neutron Source (SNS) accelerator complex. The laser wire profile scanner is based on a photo-detachment process and therefore can be conducted on an operational H⁻ beam in a nonintrusive manner. The parallel profile scanning system makes it possible to simultaneously measure profiles of the 1-MW neutron production H⁻ beam at 9 different locations (corresponding to energy levels of 400 – 950 MeV) of the superconducting linac using a single light source. The entire measurement process takes less than 5 minutes to complete. Together with the hardware modification, we have also upgraded our user interface to visualize the 9-pairs of H⁻ beam profiles in a real-time fashion, which presents a highly intuitive and informative picture of the H⁻ beam propagation along the acceleration path. The laser wire based parallel profile scanning system provides a powerful tool for accelerator operators and physicists to study the SCL modelling, monitor and/or tune the beam parameters.
	Slides THOAB101 [2.277 MB]