1. Experimental program for module array
CLIC module
Experimental program for module array
Good morning, during the past period we have studied the dynamic response of the CLIC module and today I will present you this study and the results
Elena Daskalaki

2. Current status Steady-state response Thermal & alignment All module
Influence of:
applied power
ambient temperature
water flow
air speed
Transient response
Thermal & alignment
SAS
Influence of:
applied power
ambient temperature
water flow

3. Current status Steady-state response
Final state depends on power, ambient temperature and water flow.
No dependence on air speed
Maximum displacements monitored (μm) in nominal unloaded conditions:
Transient response
Dynamic response depends highly on water flow.
Thermal time constant of SAS ranges between 4-11 minutes.
High correlation of temperature and alignment dynamics
Temperature measurement could be used as an indicator of displacement.
SAS
PETS
DBQ
Vertical 30 20 50
Radial 15 10
Alignment measurement precision: ±5 μm

4. Objectives Final displacement vs CLIC tolerances
Which would be the desired dynamic response?
Can we control to desired dynamic response?
Modules’ interconnection
MB-DB dependencies
Relate module to CTF3/CLIC
Experimental procedure
How accurate do we want to be?
Measurement resolution
Hardware (e.g. chiller temperature cycle, heaters power, room ventilation)

5. Preliminary plan Test Vacuum Modules Response Reason
T0: repeat and compare No
T0-1, T0-2
Steady-state
Transient
Heating configuration SAS,PETS
Independent SAS, PETS power
Real DBQ
Other mechanical differences (e.g. vacuum tank)
Better study of DB T1
Thermomechanical comparison T0-T1
Inter-connection
T0-1, T0-2, T1
Interconnection between modules
DB-MB dependencies
Yes
T0-2, T1
Test under vacuum
Failure modes
Single SAS breakdown case
Control of transient response through water flow adjustment
Vibration Analysis
Characterization of noise sources
MBQ tolerances