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The Lineage of Nuclear Polarization Instrumentation Often Leads Through Madison. Sourcery, Targetry, and Polarimetry. Thomas B. Clegg University of North Carolina at Chapel Hill and Triangle Universities Nuclear Laboratory. Sourcery - 1964.

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the lineage of nuclear polarization instrumentation often leads through madison

The Lineage of Nuclear Polarization Instrumentation Often Leads Through Madison

Sourcery, Targetry, and Polarimetry

Thomas B. Clegg

University of North Carolina at Chapel Hill

and

Triangle Universities Nuclear Laboratory

sourcery 1964
Sourcery - 1964

First production of polarized H or D negative ions

I beam = 300 pA

sourcery 1965
Sourcery - 1965

First acceleration of polarized ions in tandem accelerator

Polarization preserved with foil stripper

Ibeam  10-20 pA

Pbeam 0.45

sourcery 1967 8
Sourcery – 1967/8

First Lamb-shift polarized source installed on an acceleratorFirst purely vector- and tensor-polarized deuteron beams

sourcery 1968
Sourcery - 1968

Begins long association with Wilmer Anderson et al.

targetry 1968
Targetry - 1968

First spin correlation measurement with polarized beam & target

Ptarget 0.1

Ibeam 0.5 nA

Two points in 48 hours!

Axz

θcm

polarimetry 1968 71
Polarimetry – 1968-71

p + 4He

Ay

Ay = 1 points

Proton Lab Energy

First absolute calibration method for spin-1/2 particle polarization

slide8

Sourcery - 1978

First ionization of polarized atoms with a cesium beam

Ibeam3μA

Pbeam 0.89 !!

targetry 1980
Targetry - 1980

First test of teflon-coated target cell for stored polarized atoms

Some target atom polarization was maintained

after ~900 wall collisions

targetry 1992
Targetry - 1992

Proved that storage cell target was compatible with

the IUCF Cooler Ring and that p + p scattering

measurements are possible with such a target.

targetry 19921
Targetry - 1992

First measurement of polarization of ions extracted from a target

Showed that deuterons

in extracted

molecular ions are almost

completely unpolarized.

targetry 1993 4
Targetry – 1993-4

First detailed studies of depolarization of stored atoms

on various wall surfaces over a range of temperatures

targetry 1993
Targetry – 1993

First test of polarization of atoms in a prototype of the Indiana Cyclotron Facility Cooler Ring polarized target

Polarization measured by p + p scattering at 7.6 MeV.

Ptarget > 70% of Pmax

sourcery 1991 93
Sourcery ~ 1991-93

Developed an optimized atomic beam source

with permanent magnet sextupole systems

targetry 1989 95
Targetry ~ 1989-95

Scattering from stored polarized atoms in a storage ring

FILTEX Source

at Heidelberg

targetry 1992 98
Targetry ~ 1992-98

PINTEX

at IUCF

targetry 1993 2005
Targetry ~ 1993-2005

Internal storage cell target enabled first measurements

of nucleon’s internal spin structure

HERMES

Collaboration

at DESY

polarimetry targetry 2001 05
Polarimetry/Targetry ~ 2001-05

Developed polarized jet target to measure the RHIC

beam polarization after acceleration

by using p + p scattering

H-Jet

at RHIC

slide19

SPIN

SPIN

SPIN

SPIN

SPIN

SPIN

SPIN

SPIN

SPIN

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SPIN

Sourcery, Targetry, and Polarimetry