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Uranium setup for the neutrino line experiment. Schematic diagram of Booster_BtA_AGS Complex. SS_A06 Injection Point and Matching point. SS_A05_kicker. SS_L20_Injection Septum. L20 Pos. & Ang. Inj. Bumps. AGS. G and H extraction bumps to AtR. BtA. H10 Extraction Septum to AtR. - PowerPoint PPT Presentation
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Uranium setup for the neutrino line experiment
Schematic diagram of Booster_BtA_AGS Complex
Booster
BtA
AGS
SS_A06 Injection Point and Matching point
SS_L20_Injection Septum
Exit SS_F6_Septum Extraction Point Beginning of BtA
SS_A05_kicker
SS_F03_kicker
L20 Pos. & Ang. Inj. Bumps
Extraction Bumps
G and H extraction bumps to AtR
H10 Extraction Septum to AtR
U_L
ine
SS-H13 Start AtR Line
Schematic arrangement of current transformers and Flags/stripping foils in the U/W line during U+90 +91 +92 transport
4.250 bend
uxf1
Uf2
uxf3
Au
+77 +
78 +7
9
80 bend
200 bend
U+90U
+90 +91 +92
wxf1 U+90 +91 +92
W fo
il 0.
025
mm
Uf3
Uf4
Uf5
Wf1
Wf2 Wf3
Uf1,Uf2,Uf3,Uf4, Uf5 (2 mil Gd2O2S:Tb on 1 mil Al subtray)
Wf1,Wf2, Wf3 (2 mil Gd2O2S:Tb on 1 mil Al sub tray)
Uf1
Uranium beam at AGS Extraction
• species 238U+90 • B=92.816 Tm• rel=0.995125• =10.14065• t=25 ns
Beam Optics (AGS to target of Neutrino Line)
• Establish circulating beam in AGS at extraction energy with extraction bumps turned on.
• Start at G10 kicker location (G10 kicker ON) and transport the beam down to neutrino line.– Constrains used in beam transport:
• Maintain beam size to clear beam apertures.• Beam achromatic at the target location???
Stripping effect of Wstripper or Uf2 on U+90
How do we reduce the beam at the target to 5000 particles/bunch
• Focus the U+90 on target and use dipole and quadrupoles to deflect the core of the beam and also defocus it.
• Focus the U+90 on target and use insert the Wsripper and/or the Uf2 flag to strip away the tripped U ions and hope the intensity of the unstripped ions is good enough to be detected at the target. Alternatively change the setting of the 8o bend to allow the U+91 beam which has higher intensity..
• Focus the U+90 on target and use insert flags down stream of the 8o bend. Defocus the beam using Q10 to Q13 qudrupoles.
Stripping of 10.3 GeV/n Au+77 ions Using: a) 1.0 [mm] Al2O3
b) 0.025 [mm] W foilc) 0.051 [mm] Gd2O2S:Tb on 0.0254 [mm] Al
Only results from measurements are presented.
For any other information on the measurements please conduct
Schematic arrangement of incoming Au+77 ions, the stripping foil and the ions emerging after the foil
Stripping foil
Au+77 Au+77 Au +78 Au+79
Measurements of some quantities after stripping.See next slide for explanation
Stripping Foil Mat.
[mm]
Au+79 [%]
Au+78 [%]
Au+77 [%]
E[%]
e[%]
Fragm.[%]
0.025W
99.8 0.2 0.0?? <0.05 <5 <0.5
1.0Al2O3
99.99 0.01 0.00? 0.25 20 4.0
0.051Gd2O2S
76 22 2 <0.05 <5 <0.5
* The symbol “<“ in the Table signifies that the value of the measured quantity is below the resolution of
the measuring device.
Explaining the Table of the previous slide
Column# Remarks
1 Thickness and composition of the stripping material2 Fraction of charge state Au+79 emerging from striping foil.
Current transformers were used if all the charge state populations were >1%Visual Flags were used if any of the charge state populations were <1%
3 Fraction of charge state Au+78 emerging from striping foil.4 Fraction of charge state Au+77 emerging from striping foil.
The visual Flags indicated the presence of Au+77 but it was difficult to quantify.
5 Energy loss of the incident beam Au+77 after it was stripped to Au+79
6 Increase in the beam emittance.The measured beam emittance of the Au+77 beam with no stripping is ~10 p[mm·mrad].
7 Nuclear Fragmentation of the incident beam Au+77 due to the interaction with the foil material.