High energy polarized beam at the ZGS Page: 4 of 8
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
I. A1 for each polarimeter.
2. 'tse-to-pulse N, N1t data and the calculated
pjclarir.atioa f<.r each.
3. Also, the pularizattnn accuimulatril averages for
the threr polari meters are rnvt to the experi-
m:nntrn via the CUPID system. The accumzula-
tion in the computer is reret whenever polarity
is change;. or a new run started.}
tK
I. Pole Face Windings
To minibMizie the nonlinear depolarization aris-
ing from field terms such as
2
the pole face winding 19 are set to produce a flat
vertical tune over as much of the aperture of the ZGS
as possible.0.86
- n ~
mw * atFig. 4. Photograph of the polarization consolettc
showing the source control panel and read-
sout and the pIalariaation input/output data
panel.
C. itidcine Viagnostics
A bare minimuni of machine diagnostics was
made operational for low intensity: an injected charge
measurrlrelt. a circtlating brami :mrasurcmcnt. and
a beam hun-h signal for 1W phase feedback
comnrsamiftilt.
The $ON circulating inteonity U electrode pro-
vides a signal id a feve millivolts at levels of
1- a It ;proton e splsr.
The aegiirmtnted wire %nt ehamnhe r"a 18 ISWC )
extrictred hr-am psritnua nttnitorn are quite important
fesr thz- opration of the XG extracted beams. While
the S&+I'% are not vntahl at palarierd proton intensi-
ties, prnportional rhambe rA are. Fortunately, the
scanning slrctronkls can operate with either, so
enough proprunal chamber were built to instru-
m vl r tracirts beasm lines for three a inmtktaneous
p}aulariotr4e Irotno z'aperisment a. Lhsr new chambers
pratviztt- the .nnae type of bram profiles as SWIC's
and g rr.atly lavilutate bramu line tuanup.0*4
'i
g0.82
0.80
W 0.80.76
0.740 00 0000000 0 0000
0 m 0
-4-
dr/d 0.000oflt
!_._L L _ I I I, I I I-6 -4 -2 0 2 4 6
RADIAL POSITION in.]8 '0 12
Fig. 5. Typical ZGS vertical tune profile as a
function of radius.
Figure S shows a typical profile. The change in
vertical tune as a function of radial position is
lx W 0.00075/in. over the width of the accelerated
beam (4 in.).
Tune measurements were made at I kG intervals
throughout the ZGS cycle. Up to 14 kG. the tunes
remain flat to u 0.001 in. and then increase to
0.004/in. by 16 kG and remain at this level to full
field 19.8 kG.
R. Pulsed Quadrupoles
In order to create the fast vertical tune change
to pass through the depolarizing resonances, a pair
of pulsed qundrupoles spaced 1800 apart was installed
0 i
Fig. 6. top halt of pulsed quadrupole allowing com-
puter-designed pole profile and copper
placement.tyr I sv
-
Upcoming Pages
Here’s what’s next.
Search Inside
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Khoe, T. K.; Kustom, R. L.; Martin, R. L.; Parker, E. F.; Potts, C. W.; Ratner, L. G. et al. High energy polarized beam at the ZGS, article, October 31, 1974; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1025869/m1/4/: accessed March 29, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.