beam instrumentation.pdf

7/29/2019 beam instrumentation.pdf

1/17

Test Beam infrastructure


2/17

Outline

1. beam momenta

2.intensities

3.PID

4.Experimental magnet5.Triggers

6.Detector manipulation and assembly

7.Electronics

8.Gas and HV sytems, DCS (slow control)9.First comments on cost, manpower, timescale


3/17

Choice of beamline

Indicated momentum range: 100MeV/c to 20GeV/c

Best match, purely on the base of momentum,wouldbe the T9 beamline at the PS ...

but also a large and powerful magnet was desidered,so second-in-the-row is the H8 SPS beam line,located in the Nort Hall.

Lets be clear: what follows makes sense if and only if

we need to put a detector in a 1.5T B field


4/17

H8 beam line

Secondary beamline of the primary T4 target, capable ofdelivering 5 GeV/c to 300 GeV/c secondaries

In our momentum range, 5 to 20 GeV/c is standard

1 to 5 GeV/c adaptation already studied for the Atlas

test-beam. It implies a secondary target and generationof a tertiary beam. To be discussed with experts,feasible.

100 MeV/c to 1 GeV/c might need additional equipmentand instrumentation (e.g. slow down particles in

absorbers)General rule: the lower the momentum, the lower theintensity


5/17

.

TARGET

T4

Scale :

100

200 mm

0

0

2 4 86 10 m

B1T B3TB2T

P0 beam

H8 beam

H6

beam

450 GeV/cprotons

!prod

BEND

1


6/17

i l

Concept of

tertiary beam(source:I. Efthymiopoulos

notes)

Possible addtions (t.b.d)

Absorber

(instrumented?)

Momentum

analysis + PID

~1 GeV/c ~100 MeV/c


7/17

Intensity

Indicated statistics: n*10^4 events per setting

Need to know more precisely how many settings. How manyangles, particles/momenta, detector configurations?

My first guess is 10^7 events.

To fulfill this in 2 weeks (standard duration of a test-beam)one needs ~10^3 particles per spill.

No problem at higher momenta, lower momenta will be slower,but not quantified yet.

Time to modify/manipulate the detector not included.

This point is important: we have to state how much time weneed as primary users of the beam line.


8/17

PID

Indicated particle ID at the 10^(-3) level. This is quitechallenging

Best match I could indicate is the NA56/SPYapproach (incidentally, located in H6 - the line

closeby H8)Very long instrumented beam line, designed toanalyze particle production from 7 to 60 GeV/c(hadron production for the WANF neutrino beam)

PID was at the % level. Is this enough?

Need studies and simulations if we need anythingbetter.


9/17

T4-berylliumt

arget

0m 100m 500m400m300m200m

vertical plane

horizontal plane

hadroncalorimeter

T4

NA56 / SPY instrumented beam line


10/17

Magnet

H8 is equipped with a large (1.6m bore) super-conducting dipole, the so-called Morpurgo magnet

1.56T is standardField maps exist, most recent are likely those of theAtlas test-beam

I assume that operational costs (He consumption) are

going to be included in some agreement with CERN


11/17

Z slice

XY slice at the center


12/17

Triggers

I do not expect this to be a problem in aninstrumented beam line

No cosmic triggers have been requested (... correct?)so no special coverage with large-area scintillatorplanes

Design of coincidences and particle tagging to bedone, but not urgent as of now


13/17

Detector assembly and manipulation

Each detector type most likely need a specificplatform

At least one platform for detectors to be insertedinto the magnet (plus insertion/extraction rails)

Platform for magnetized iron types needs sliding/tilting mounting plates to accommodate the need for

data taking at different angles

changing active/passive materials and

configurationsCrane not a problem (single element weight belowmaximum at the NH)


14/17

Electronics

From considerations about intensities, it follows thatthe electronics must cope with n*10^3 events per

spill - which I assume it is not a problem with theSPS long spills.

DAQ has to cope too. Again I do not expect this tobe a show stopper.

More specific issues not my duty ...


15/17

Gas and HV systems, DCS

MIND/ECC/TASD detectors need fairly standard HV and gassystems. I assume these systems can be a common investmenttogether with the other users of the infrastructure

Same applies to DCS (slow control) system for detectorcontrol and environmental monitoring

Exceptions:

power supply for magnetized iron coils

L-Ar HV and gas system

... ?

I also assume that barracks and counting houses will beincluded in the common infrastructure or negotiated withCERN


16/17

Cost

Main items to include in a cost analysis

beam line equipment and modifications

construction of assembly and manipulation

equipment for detectorsbeam line instrumentation

Total amount is going to be similar to infrastructurefor a small experiment

There will for sure be costs for cabling, piping andtechnicians during installations


17/17

Time-scale

Physicists/engineers: 1 DAQ, 1 Electronics, 1mechanical engineer

First activities must be

discussion with beam line experts

simulation of the beam line

mechanical design

if time-scale is 2009-2012, these activities shouldstart rather soon.

beam instrumentation.pdf

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