Hellenic Contribution to the LHC

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15 Νοε 2013 (πριν από 3 χρόνια και 10 μήνες)

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Hellenic Contribution to the LHC
Hardware Commissioning

Rachel
-
Maria Avramidou

On behalf of the Hellenic Team

The team

Anastasopoulos

Konstantinos


Avramidou

Rachel

Dragoneas

Antonios


Fampris

Xenophon


Gousiou

Evangelia


Kalkanis

Theofanis


Karagiannis

Fotios


Koumparos

Athanasios


Patsouli

Anastasia


Polychroniadis

Ilias


Theodoropoulos

George


Vottis

Christos


1 physicist (PhD), 1 computer scientist, 3 computer engineers, 7 electronics engineers

Introduction to LHC

Two
-
ring

superconducting

pp

collider

of

27

km

circumference

The

dipoles

must

operate

at

8
.
3

T

and

be

cooled

in

superfluid

helium

at

1
.
9
K

Basic layout

8

sectors

(~
3
.
3

km)
:

arcs

and

straight

sections

(~
528

m)

P
1
:

ATLAS

detector

P
2
:

ALICE

detector

P
3
:

Collimation

system

to

capture

off
-
momentum

particles

P
4
:

Radio

Frequency

superconducting

acceleration

cavities

(
400

MHz)

P
5
:

CMS

detector

P
6
:

Beam

abort

systems

for

the

beams

to

be

extracted

safely

and

deposited

onto

external

dump

(absorb

the

stored

energy)

P
7
:

Collimation

system

to

control

the

beam

halo

P
8
:

LHCb

detector

LHC Status


Installation

of

LHC

almost

completed


Emphasis

moves

from

installation

to

commissioning


The

cool

down

of

the

sector

7
-
8

to

helium

liquid

temperature

recently

completed


First

beam

injection

(
450

GeV/c)

is

foreseen

before

the

end

of

the

year

to

debug

the

machine

and

detectors


First

physics

run

at

7

TeV

per

beam

in

2008

Team contributions


Development

of

the

Test

Bench

that

assures

the

quality

of

Cryogenics

Electronics



Debugging

of

Cryogenic

Instrumentation

in

the

tunnel


PVSS

(software

development

and

graphics)


Communication

and

coherence

tests

(CIET,

PLC+SCADA,

troubleshooting)


Installation,

configuration,

initialization

and

troubleshooting

of

the

electronics

units

for

the

positioners


Testing

and

troubleshooting

for

the

cryogenic

sensors,

cards

and

cables

with

the

Mobile

Test

Bench

(MTB)


Cryogenics

electronics

for

the

radio

frequency

system

(design,

installation,

etc)


Sensor

cabling

(deployment,

connection,

extensions)


Sector

inspection


Preparation,

labeling

and

installation

(connections)

for

the

crates
.


Labeling

(crate

positions,

IFS

cables,

QV

valves,

sensor

cables

etc)


Measurements

with

gauge

level

(helium

level)

and

data

analysis


ATLAS

(A
.

Koumparos,

G
.

Theodoropoulos,

C
.

Vottis)


CMS

(K
.

Anastasopoulos,

F
.

Karagiannis,

I
.

Polychroniadis)

Cryogenics instrumentation installation in the tunnel

Instrumentation

crates

(~
800
)

are

being

installed

and

connected

to

the

LHC
.

They

contain

electronic

cards

that

measure

temperature,

pressure

and

cryogenic

liquid

level
.


Test Bench

Development

of

the

Test

Bench

that

assures

the

quality

of

all

electronics

for

Cryogenics

(Temperature,

Pressure,

He

Level

Transducers)

in

their

manufacturing

factory
.


This

Test

Bench

consisted

of

a

means

of

debugging

the

pre
-
series

designs

of

the

electronics

in

order

to

conclude

to

their

final

models

that

went

to

mass

production
.


Debugging

of

Cryogenic

Instrumentation

(electronics,

cables,

sensors)

after

their

installation

in

the

LHC

tunnel
.



Mobile test bench


Useful tool for the
electronics troubleshooting


Consistency test


Card test (simulation)


Instrument test


Examples

of

problems
:

not

connected

and

wrongly

connected

cables

(machine

side),

blown

fuses,

bad

cables,

broken

connectors,

missing

connections

Profibus

DP/PA

couplers

Drawers

with

intelligent

valve

positionners

rack front

rack back

Digital Valve Positioners for QRL

Intelligent

positioners

(communicating

by

Profibus

PA)

used

to

adjust

and

control

the

pneumatic

actuators

of

the

cryogenic

control

valves

of

the

QRL

(cryogenic

distribution

line)

1.
The

electronic

unit

in

radiation

protected

areas

2.
The

pressure

radiation

block

close

to

the

valve

(potentiometer

reads

the

stem

position,

2

piezo
-
valves

pressurise

and

depressurise

the

pneumatic

actuator)

Installation, configuration,
initialization and
troubleshooting of the
electronics units

Cryogenics Control System

-
Cryo Control System


Provides

the

measurements

from

the

cryogenics

instrumentation

(Temperature,

Pressure,

Level

and

QV,

PV

valves)
.

Gives

orders

to

the

heater

actuators

coming

from

the

control

system

PLC

and

commands

to

protect

the

Level

measurements

electronics


-
CIET: Cryo Instrumentation Expert Tool


Provide

all

the

info

coming

from

the

signal

conditioners/electronic

boards

to

the

cryogenics

experts

by

means

of

an

expert

tool

based

on

PVSS




PVSS

-
The

SCADA

system

used

in

UNICOS

-
Provides

the

supervision

layer

for

the

cryogenics

instrumentation


-
The

supervision

layer

is

designed

in

PVSS




Contribution to PVSS

-
Design and maintain the supervision panels

Contribution to PVSS

-
Develop the necessary software tools for fast and efficient
maintenance.



Team’s web page

The

webpage

was

developed

during

summer

2006

by

A
.
Koumparos

as

a

mean

to

offer

some

information

to

the

public

about

our

contribution

to

the

LHC

and

the

other

experiments
.


http://cern.ch/hellenicomm/

Conclusions


Working

at

CERN

is

a

unique

experience

for

young

scientists

and

engineers


The

team

has

been

adjusted

quickly

to

the

CERN

environment,

has

gained

experience,

has

increased

speed

and

efficiency

and

is

highly

appreciated

by

CERN

group
.


Many

thanks

to

all

people

who

made

this

project

a

reality


Some

more

support

by

the

greek

administration

concerning

relevant

issues

would

have

been

very

helpful



Extra slides

Controls architecture for LHC full sector

TT

1050

CV

300

PV/QV

85

PT

100

LT

50

EH

300

all

1900

Full Sector

All

valves

in

alcoves

accessed

through

Profibus

All

tunnel

instruments

accessed

through

WorldFip


Cooldown



2

weeks

of

flushing



Electrical

quality

assurance

test



2

weeks

from

ambient

to

80

K



Second

electrical

quality

assurance

test



1

week

from

80

K

to

4
.
2

K

and

then

to

1
.
9

K