AGS fixed target program and plans - PowerPoint PPT Presentation

1 / 16
About This Presentation
Title:

AGS fixed target program and plans

Description:

AGS fixed target program and plans – PowerPoint PPT presentation

Number of Views:25
Avg rating:3.0/5.0
Slides: 17
Provided by: nick179
Category:
Tags: ags | fixed | nwcn | plans | program | target

less

Transcript and Presenter's Notes

Title: AGS fixed target program and plans


1
AGS fixed target program and plans
  • Present performance and program
  • Planned AGS fixed target operation
  • AGS intensity upgrades

2
C-AD Accelerator Complex
1200 oclock
PHOBOS
200 oclock
1000 oclock
RHIC
400 oclock
800 oclock
600 oclock
AGS Intensity 7 ? 1013 protons/pulse Injector
to RHIC lt 2 hours about every 10 hours
Fast extraction
U-line
High Intensity Source
BAF (NASA)
m g-2
LINAC
HEP/NP
Pol. Proton Source
AGS
BOOSTER
With 2 GeV AGS inj. kicker ? 1 ? 1014
protons/pulse (?)
Slow extraction
TANDEMS
3
AGS performance for g-2 operation
  • 6 single bunch transfers from Booster
  • Peak intensity reached 72 ? 1012 ppp
  • Bunch area 3 eVs at injection
    10 eVs at extraction
  • Intensity for g-2 ops 50-60 ? 1012 ppp
  • Strong space charge effects during accumulation
    in AGS
  • 2nd order transition energy jumplimits available
    momentum aperture.
  • Chromatic mismatch at transitioncauses emittance
    dilution
  • Dilution needed for beam stability

4
7 Jul 01
AGS Experimental Area
E821, m g-2 E952, n mass (proposed to DOE)
FY2001 Physics Program- In Progress
Proton HEP, 12 weeks 25 GeV/c FEB
HEP/NP, 6 weeks 25 GeV/c SEB
DP/BES, 2 weeks 3-25 GeV/c FEB
HEP/BES, 4 weeks 25 GeV/c FEB, parasitic Fe
NASA 1 week 0.6-1 GeV/n Fe
U -E955, Proton Radiography (DP)
V1, p m Beam Line
V-Target
U Line
RHIC Transfer Line

D6 - E930, L Hypernuclei (Ge Ball)
A3 E957, NASA Radiobiology (Fe)
D-Target

A3- E951, mm Collider Targetry
A-Target

B-Target
C-Target
B5 - m channel E940, m N eN (proposed to NSF)
C-Target


B-Target
C4-LESBIII E949, K pnn



C7 - E956, Neutron Spallation (BES)
C10 - neutral beam E926, KL0 p0nn (proposed to
NSF)
C-Target
C5-Idle
C6-LESBII, Crystal Ball Idle E927, Ke3 Tests
E953, Baryon Spectroscopy E958, p- charge
exchange
C8-LESBII, NMS E931, DI1/2 Rule
5
B C- Line Experimental Area, FY 2001
B2 Test Beam
MPS
B1 Test Beam
E871, KL0 me (complete 1996)
E956, SNS Test Facility (commissioned FY 2001)
E896, H Search (complete FY 1998)
E949, K pvv- (FY 2001-3)
E850, Color Transp (complete FY 1999)
E931, DI1/2 Rule (FY 2001-2)
E953,E958,E927, Crystal Ball (FY 2002)
6
7 July 01
E952, n mass (proposed to DOE)
AGS Experimental Area
FY2002 Physics Program- Proposed
Proton HEP, 10 weeks 25 GeV/c SEB
NP, 4 weeks 25 GeV/c SEB NP,
10 weeks 25 GeV/c SEB (parasitic)
HEP/BES, 25 GeV/c FEB (to be determined) Fe
NASA 1 week 0.6-1 GeV/n Fe
U-idle
V1, p m Beam Line
V-Target
U Line
RHIC Transfer Line

D6 - E930, L Hypernuclei (Ge Ball)
P959, kaonic nuclei (proposal)
A3 E960, NASA radiobiology (Fe)
D-Target

A3- E951, mm Collider Targetry
A-Target

B-Target
C-Target
B5 - m channel E940, m N eN (proposed to NSF)
C-Target


B-Target
C4-LESBIII E949, K pnn



C7 - E956, neutron Spallation (BES)
C10 - neutral beam E926, KL0 p0nn (proposed to
NSF)
C-Target
C5-Idle
C6-LESBII, Crystal Ball E927, Ke3 tests E953,
baryon spectroscopy E958, p- charge exchange
C8-LESBII, NMS (removed after FY 2002 run) E931,
DI1/2 Rule
7
RSVP Experiments, Plan View
7 GeV, 20 ns rms proton pulse every 1.4 ms
MECO m-N ? e-N
E949 K ? pnn
K0PI0 K0L ? p0nn
10 m
24 GeV, 200 ps rms proton pulse every 40 ns
8
Micro-bunched slow extraction
Empty buckets generate energy modulation of
debunched beam Higher cavity voltage and/or
smaller Dp/p ? shorter bunches Need 150 - 250
ps bunches every 40 ns with about 95 extraction
efficiency
Energy
Time
Extraction resonance
Debunched beam
9
E952 (n mass)
Convert to SEB parasitic to E949 or dedicated
J-Veto
g-2 calorimeters
C-Veto
Be dE/dx degrader plus silicon strip detector
10
(No Transcript)
11
(No Transcript)
12
(No Transcript)
13
AGS intensity upgrades
  • Needed upgrades
  • 1.2 GeV superconducting linac extension for
    direct injection of 1 ? 1014 protons per pulse
    into AGS
  • low beam loss at injection
  • high repetition rate possible
  • further upgrade to 1.5 GeV and 2 ? 1014 protons
    per pulse possible
  • 2.5 Hz AGS repetition rate
  • triple existing main magnet power supply and
    magnet current feeds
  • double rf power and accelerating gradient
  • further upgrade to 5 Hz possible

14
AGS proton driver layout
To RHIC
High Intensity Source plus RFQ
To Target Station
116 MeV Drift Tube Linac (first sections of
existing 200 MeV Linac)
BOOSTER
AGS 1.2 GeV ? 24 GeV 0.4 s cycle time (2.5 Hz)
400 MeV
Superconducting Linacs
800 MeV
1.2 GeV
0.15 s
0.1 s
0.15 s
15
AGS proton driver parameters
  • present AGS 0.4 MW AGS 1 MW AGS
  • Total beam power MW 0.14 0.4 1.00
  • Beam energy GeV 24 24 24
  • Average current mA 6 17 42
  • Cycle time ms 2000 1000 400
  • No. of protons per fill 0.7 ? 1014 1 ? 1014 1 ?
    1014
  • Average circulating current A 4.2 5.9 5.9
  • No. of bunches at extraction 6 6 6
  • No. of protons per bunch 1 ? 1013 1.7 ? 1013
    1.7 ? 1013
  • Total bunch area eVs 15 5 5
  • Time betw. extr. bunches ms 33 20 20

16
Summary
  • Very successful operation for the g-2 experiment
  • Operation with 7 ? 1013 slow extracted protons
    planned for RSVP
  • Upgrade to 400 kW and 1 MW beam power feasible
Write a Comment
User Comments (0)
About PowerShow.com