AHF MAGNETIC LENS CRYOSYSTEMS[Advanced Hydrotest Facility] Page: 1 of 8
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Paper C-01B-05: Presented at CEC/ICMC 2001, Madison, WI, USA, July 16-20, 2001.
AHF MAGNETIC LENS CRYOSYSTEMS
J.P. Kelley1 and G.T. Mulholland2
Los Alamos National Laboratory
Los Alamos, NM, 87545, USA
2Applied Cryogenics Technology
Ovilla, TX, 75154-9991, USA
The Advanced Hydrotest Facility (AHF), a proton radiography and tomography
facility, is under study at the Los Alamos National Laboratory (LANL). 800-MeV protons
from the existing LANSCE linear accelerator are to be accelerated to 50-GeV and the
resulting beam split twelve fold during transport through a complex multi-path beam
transport and lens system to illuminate a study object along multiple directions. The
object-scattered protons are imaged for analysis by a system of large-bore magnetic lenses.
Design trade studies have compared normal and superconducting (SC) magnets for the
transport and lens systems as well as many other tradeoffs in systems configuration. The
development of the helium refrigerator/liquefier size and location, and distribution system
for the AHF large-bore (20 and 50 cm diameter) pool-boiling, SC magnetic lens system is
described. The magnetic-lens-option cryoplant (13-kW range at 4.43 K) and distribution
system are site positioned and sized, and the system, facility and utility costs are estimated
and compared to alternatives.
The Advanced Hydrotest Facility (AHF), a significant element of the Stockpile
Stewardship Program, will use proton radiography  to evaluate otherwise undetectable
structure of dynamic events within thick dense objects. The construction and
implementation of this dedicated facility will extend the single-axis feasibility-
demonstration work done at LANL (800-MeV) and Brookhaven National Laboratory (25-
GeV). The AHF characteristics include capability of high-resolution tomography, higher-
energy and higher-intensity proton beams (50 GeV), along with high-resolution material
A 3-GeV booster and a 50-GeV synchrotron would accelerate the LANSCE 800-MeV
proton beam to 50-GeV. Alternatively, a site-independent linac may be used to inject the
booster. The beam is split and transported through a complex multi-path beam-transport
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KELLEY, J. P. & MULHOLLAND, G. T. AHF MAGNETIC LENS CRYOSYSTEMS[Advanced Hydrotest Facility], article, June 1, 2001; New Mexico. (digital.library.unt.edu/ark:/67531/metadc721057/m1/1/: accessed April 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.