a. leveling - fermilab recent operating experience at the antiproton source target hall 3 rd high...
TRANSCRIPT
![Page 1: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/1.jpg)
A. Leveling - Fermilab
Recent Operating Experience at the Antiproton Source
Target Hall
3rd High Power Targetry WorkshopSeptember 12, 2007
FermilabAccelerator Division
Antiproton Source Department
Anthony Leveling
![Page 2: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/2.jpg)
A. Leveling - Fermilab
Synopsis of this talk
• Tevatron collider performance– Integrated luminosity by year
• Anti-proton source role– Prior to May 2004– After May 2004– Performance
• Target station operating experience– Target developments since 2003– Recent observations and developments
![Page 3: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/3.jpg)
A. Leveling - Fermilab
Tevatron Collider Program
![Page 4: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/4.jpg)
A. Leveling - Fermilab
Aerial photograph of Pbar Source
& Recycler
![Page 5: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/5.jpg)
A. Leveling - Fermilab
Co
llec
tio
n l
ens
gra
die
nt
incr
eas
es
Old
len
s an
d
Sm
all
er s
po
t si
ze o
n t
arg
et
Booster improvements
MI slip stacking
Begin pbars from Recycler to Tevatron
![Page 6: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/6.jpg)
A. Leveling - Fermilab
![Page 7: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/7.jpg)
A. Leveling - Fermilab
0
20
40
60
80
100
0
20
40
60
80
100
Recycler shotsTransfer Efficiency and Setup Time
Acc
umul
ator
to R
ecyc
ler
effi
cien
cy (
%)
Setup T
ime (m
inutes)
Jan 2005 Jan 2006 Jun 2007Jan 2007
Sh
utd
ow
n
![Page 8: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/8.jpg)
A. Leveling - Fermilab
beam absorber & sh ie ld
concre te sh ie ld ing
concre te vau lt sh ie ld w a ll
g ranu la r f ill a ir gap
a ir ba rrie r
be rm
prevau lt enclosu re
AP O Service B uild ing Upstream Endand Target V ault P artia l E levation V iew
P Q 8B P Q 9A P Q 9BV T108
726 '
754 '
s tee l sh ie ld ing
180 cm
Final focusing quads
8E12 to 9E12 protons@ 120 GeV every 2.4 s
9 steel modules30 X 180 cm
Vacuum window 120 cm
cap
8 GeV negative secondaries bend 3 degrees into page by
pulsed magnet
![Page 9: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/9.jpg)
A. Leveling - Fermilab
Target 2Six 0.95 X 10 cm diameter target disks
Seven copper cooling disksAir exhaust
3.1E19 protons – 525 day service life1/03 to 7/04
Air supply
![Page 10: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/10.jpg)
A. Leveling - Fermilab
Target 3Four 0.95 X 10 cm disks with carbon-carbon cover
Two 0.95 X 12.7 cm disks with Ti cover (destroyed by the beam)
3.2E19 protons – 420 day service life7/04 to 8/05
Air cooling flowsimilar to target 2
![Page 11: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/11.jpg)
A. Leveling - Fermilab
Target 4 – newSix 1.6 X 11.4 cm disks
With carbon-carbon cover
Air cooling flowsimilar to target 2
![Page 12: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/12.jpg)
A. Leveling - Fermilab
•Target 4 end of life
•Improved 120 GeV optics
•120 um spot size
•First target to sputter target material
•October 2005 had to increase spot size to 200 um(?)
2E19 Protons - 260 day service life8/05 to 5/06
![Page 13: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/13.jpg)
A. Leveling - FermilabTarget 5
Three disks 2.15 X 11.4 cm
Air flow
![Page 14: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/14.jpg)
A. Leveling - Fermilab
Center 10 days
Above/belowcenter 7 days
Outer positions4 to 5 days
![Page 15: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/15.jpg)
A. Leveling - Fermilab
1.7E19 protons133 day service life
5/06 to 9/06
2E19 protons119 day service life
9/06 to 1/07
2E19 protons105 day service life
1/07 to 5/08
Target 5 Target 6 Target 7
200 um spot size
![Page 16: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/16.jpg)
High Gradient Collection Lens
• Introduced 10/2006 to 12/2006
–15% improvement in target yield
• Record stacking rate achieved 2/2007
• Lens (transformer) failed in 5/2007
• Had to revert to original lens design
–Stacking rate dropped off 10 to 15% A. Leveling - Fermilab
![Page 17: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/17.jpg)
US Beam Sweeping System
• Commissioned beginning end 04/2007
• Just the upstream system
• 50% improvement in target lifetime
• 1 to 2% reduction in yield
• Reduced spot size to ~140 um
– regained stacking rate lost by lens changeout
A. Leveling - Fermilab
![Page 18: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/18.jpg)
A. Leveling - Fermilab
Target 8
1.8E19 protons88 days service life
5/07 to present
Top disk - 200 micron beam sigmawith beam sweeping radius ~0.3 mm
Middle disk – 140 micron beam sigmaWith beam sweeping radius ~0.6 mm
Beam sweeping systemcommissioned late 4/07
![Page 19: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/19.jpg)
A. Leveling - Fermilab
![Page 20: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/20.jpg)
A. Leveling - Fermilab
Inconel 600 Target Energy Deposition per 8E12 protonssigma - 200 microns
0.00E+00
5.00E+02
1.00E+03
1.50E+03
2.00E+03
2.50E+03
3.00E+03
3.50E+03
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
radial bin (0.004 cm/bin)
Jou
les
per
gra
m
longitudinal bin 1
longitudinal bin 2
longitudinal bin 3
longitudinal bin 4
longitudinal bin 5
MARS 1507 result
1 sigma
![Page 21: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/21.jpg)
A. Leveling - Fermilab
Target center to lens faceat low gradient ~ 17 cm
9cm
![Page 22: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/22.jpg)
A. Leveling - Fermilab
Inconel 600 Target Energy Deposition per 9E12 protonssigma - 140 microns
0.00E+00
5.00E+02
1.00E+03
1.50E+03
2.00E+03
2.50E+03
3.00E+03
3.50E+03
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
radial bin (0.004 cm/bin)
longitudinal bin 1
longitudinal bin 2
longitudinal bin 3
longitudinal bin 4
longitudinal bin 5
Jo
ule
s p
er
gra
m
1 sigma
![Page 23: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/23.jpg)
A. Leveling - Fermilab45 cm
![Page 24: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/24.jpg)
A. Leveling - FermilabTarget center to lens faceat low gradient ~ 14 cm
![Page 25: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/25.jpg)
A. Leveling - Fermilab
Target SEM 30 cm upstream of targetTarget sputtering events:
October 2005 (cone)June through July 2007
![Page 26: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/26.jpg)
A. Leveling - FermilabThe next generation target – December 2007
•Inconel 600 cylinder
•Copper cooling•Copper pipe shell•6 to 12 mm Cu balls•H2 brazed construction
•Be or ALBEMET outer shell•Interference fit•Excludes air at surface
![Page 27: A. Leveling - Fermilab Recent Operating Experience at the Antiproton Source Target Hall 3 rd High Power Targetry Workshop September 12, 2007 Fermilab Accelerator](https://reader034.vdocuments.us/reader034/viewer/2022051517/5697c0291a28abf838cd791f/html5/thumbnails/27.jpg)
Pbar Target Station Summary• Startup in October 2007
– Install high gradient lens (to improve yield)– Remove damaged target SEM (BL obstacle!)– evaluate pulsed magnet for replacement– restore to larger spot size (stop sputtering)
• Build next generation target– Return to 140 um spot size (to improve yield)
• Build new target SEM (spot size understanding)• Continue building spare lenses• Run, run, run . . . and integrate luminosity
A. Leveling - Fermilab