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