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

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

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

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)

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