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Featured researches published by D. Ho.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2016

A cryostat to hold frozen-spin polarized HD targets in CLAS: HDice-II

M. Lowry; Christopher Bass; A. D׳angelo; A. Deur; G. Dezern; C. Hanretty; D. Ho; T. Kageya; D. Kashy; M. Khandaker; V. Laine; T. O’Connell; O. Pastor; P. Peng; A. M. Sandorfi; D. Sokhan; X. Wei; M. Zarecky

The design, fabrication, operation, and performance of a 3/4He dilution refrigerator and superconducting magnet system for holding a frozen-spin polarized hydrogen deuteride target in the Jefferson Laboratory CLAS detector during photon beam running is reported. The device operates both vertically (for target loading) and horizontally (for target bombardment). The device proves capable of maintaining a base temperature of 50 mK and a holding field of 1 T for extended periods. These characteristics enabled multi-month polarization lifetimes for frozen spin HD targets having proton polarization of up to 50% and deuteron up to 27%.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2014

A portable cryostat for the cold transfer of polarized solid HD targets: HDice-I

Christopher Bass; Christopher M. Bade; M. Blecher; A. Caracappa; A. D'Angelo; A. Deur; G. Dezern; Harald Glueckler; C. Hanretty; D. Ho; A. Honig; Tsuneo Kageya; M. Khandaker; V. Laine; F. Lincoln; Michael M. Lowry; J. Mahon; T. O'Connell; M. Pap; P. Peng; B. Preedom; A. M. Sandorfi; H. Seyfarth; H. Stroeher; Craig E. Thorn; Xiangdong Wei; C.S. Whisnant

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A. Deur

Thomas Jefferson National Accelerator Facility

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A. M. Sandorfi

Brookhaven National Laboratory

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C. Hanretty

University of Virginia

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Christopher Bass

Thomas Jefferson National Accelerator Facility

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G. Dezern

Thomas Jefferson National Accelerator Facility

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M. Khandaker

Norfolk State University

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P. Peng

University of Virginia

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V. Laine

Thomas Jefferson National Accelerator Facility

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A. Caracappa

Brookhaven National Laboratory

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A. D'Angelo

Thomas Jefferson National Accelerator Facility

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