NA62 SILICON PIXELS DETECTOR

VIBRATIONS MEASUREMENT1Vittore Carassiti - INFN FENA62 GTK Meeting

08.02.2011, CERN

2Vittore Carassiti - INFN FENA62 GTK Meeting 08.02.2011, CERN

MEASURING INSTRUMENT

MTN/VM120 VIBRATION METER

Constant current type accelerometer (10 mV/g sensitivity)

RMS and peak to peak detection of acceleration (g) , velocity (mm/s) and displacement (μm)

Reduction of the wide band noise by a low pass filter; filter selection : 1-5-10 KHz

3Vittore Carassiti - INFN FENA62 GTK Meeting 08.02.2011, CERN

THE DETECTOR CONSTRAINTS

THREE POINTS BY 50 μm THICKNESS KAPTON FOIL

4Vittore Carassiti - INFN FENA62 GTK Meeting 08.02.2011, CERN

MEASURED VIBRATIONS

Tested parts Deflection(μm)RMS

Velocity(mm/s)

RMS

Acceleration (g)

RMS

Filter(KHz)

Room floor 20 - - 1

Test bench 20 - - 1

Supports 20 - - 1

Vessel no flow

20 - - 1

VesselFrom 1 to 8 m^3/h

20(no vibrations

inside)

6,4 0,05 1-5-10

5Vittore Carassiti - INFN FENA62 GTK Meeting 08.02.2011, CERN

PROTECTIVE RUBBER TEST

TWO TYPES OF RUBBER HAVE BEEN TESTED IN LIQUID NITROGEN (3 DAYS) :

3140 RTV COATING (SILICONE RUBBER)

186 SILICONE ELASTOMETER (BICOMPONENT)

NO CRACKS ; NO LOSS OF ELASTICITY

6Vittore Carassiti - INFN FENA62 GTK Meeting 08.02.2011, CERN

NEXT STEPS

MAKING A BOARD FOR THE WIRE BONDS TEST

FRONT BACK

7Vittore Carassiti - INFN FENA62 GTK Meeting 08.02.2011, CERN

NEXT STEPS

OPTIMIZATION BY SIMULATIONS OF THE NITROGEN GUIDE CHANNELS

TEST AIMING TO VERIFY THE EFFECTIVE TEMPERATURE DISTRIBUTION ON THE DETECTOR

DESIGN OF THE NITROGEN SUPPLY SYSTEM