instrumentation needs
DESCRIPTION
Instrumentation needs. M. Meddahi. General layout Requested instruments and precision LTI CNGS Beam instrumentation layout. TT60. Dynamic range. TI 2 and TI 8 beam :. From one pilot to 4 trains of 72 bunches. 5 10 9 (pilot) to 4.9 10 13 p/extraction (ultimate). - PowerPoint PPT PresentationTRANSCRIPT
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
1
Instrumentation needs
• General layout
• Requested instruments and precision» LTI
» CNGS
• Beam instrumentation layout
M. Meddahi
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
2
TT60
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
3
Dynamic range
TI 2 and TI 8 beam : From one pilot to 4 trains of 72 bunches
5 109 (pilot) to 4.9 1013 p/extraction (ultimate)
Slow extracted beam
CNGS : 2 extractions of 10.5 s in a 6s cycle2.4 1012 p (SU) to 3.5 1013 p/extraction (ultimate)
T1 :
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
4
Beam Position monitors
Precision required :+/- 0.1 mm
BPM radius 30 mm
Within 20 mm : precision : 0.3% --> +/- 0.1 mmOutside : precision : 1% --> 0.3 mm
resolution : 1 per mil --> 0.03 mm
Select : all bunches individually (same electronics as LHC)2 processes running in parallel (one accumulating the average data, one for a particular bunch or all bunches individually).+CNGS : beam angle accuracy : 0.1 mrad
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
5
Intensity measurementsBeam current transformers : Very good absolute precision difficult
Relative 1 %
Intensity measurements possible with BPM if both X and Y axesequipped :+/- 1% precision in radius of 15 mm+/- 2 % in radius of 20 mm
Also
Some BPMs will be equipped in both planesInteresting tool to check the intensity along the line, where losses might occur
Equip the line with both BCT and few X/Y BPMs
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
6
Beam loss monitors
Ionization Chamber :
30 BLMs in each TI18 in TT41
Sensitivity/resolution ~3000 e- /primary chargesVery broad dynamic range (0.1% of pilot/ultimate)
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
7
If more required : one selected bunch, a selected train, ------> need to equip screen with PM or electronic shutter
Profile measurements : Optics checksEmittance measurements
Precision:
Measure the emittance taking these precisions into account (+ error on Twiss)
Measure pilot, integrate a whole batch.
Others : Gaussian beam
Non-Gaussian: rms with better precision
Selection:
Pilot (Alumina screen) ~ 5%
~ 4%
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
8
SPS extraction
Kickers Septa
Bumper 2 Bumper 3Bumper 1 Bumper 4
418
419417
x (m
)
s(m)
- measurement of the bumped beam position
- simultaneous horizontal & vertical orbit acquisition
- Extracted beam profile & position at the entrance and exit of septum.
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
9
Extraction LSS4 and LSS6
- OTR : Use of OTR being investigated
- BLM:
Special BPM in front of septum magnet
Aperture radius : 100 …110 mmrequired precision & linearity : 100 … 200 mover 50 % of aperture, i.e. 0.1 … 0.2 %------> factor 20 ….
- BPM :
Important for setting up (low intensity),for post mortem for the extracted beam,for interlocking to beam dump for circulating beam(bad bumper setting or septum position).
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
10
OTR1 OTR2OTR3
OTR5OTR4
TED TT40 and start of TI 8
BPM (2-in-4 scheme)
BCT
BLM
Modified BPCK (LHC and CNGS beam)
CNGS
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
11
OTR6
OTR7
OTR8
TI 8
BPM (2-in-4 scheme)H/V = 600
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
12
OTR9
OTR10
OTRSMSI
OTR11 OTREMSI
OTRSMKI
OTREMKI
MSI MKIInjection into LHC
TED
TED : final check point before injection into LHC
BPM
BCT
BLM
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
13
Proposed Added BPM
BLM
BPM
OTR
Injection into LHC
TCDD
H- Plane
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
14
TED
OTR6
OTR7
OTR8
OTR5
OTR4
OTRSMSIOTR10
OTR9
MSI MKI
OTREMSI
OTRSMKIOTREMKI
OTR1,2,3
TED
OTR11OTR12
TT60 and TI 2
BPM (2-in-4 scheme)
BCT
BLM
Modified BPCK
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
15
Last 200 m
Profiles
Profiles Profiles
BL
M
BL
M
BL
M
BL
M
PositionIntensityProfiles
10/07/2001 M.Meddahi
Instrumentation needsLTI and CNGS Controls Review
16
Summary
TT40 TT60 TT41 TI 8 TI 2
BPM 4 4 20 43 48Profile 3 2 + 1new 6 13 14
BCT 1 1 1 1 1BLM 6 6 18 30 30
TBIU/TBID 2