R&D LINE ON ACTIVE PIXEL DETECTORS P1.6 Fiber optic enviromental and structural vertex monitor. Ciemat, October 27 th D. Moya, I. Vila, A. L. Virto., J.González Instituto de Física de Cantabria (CSIC-UC ) G. Carrión, M. Frövel. Instituto Nacional de Técnica Aeronautica (INTA )

Outline — FOS in DESY’s thermo-mechanical mock-up. _ Fibers Set-up _ Preliminary and partial results — Beast II _ Test Beam monitoring _ Beast final schedule 9th VXD workshop, Sep 8th,2015, Trieste. 2

FOS in DESY’s thermo-mechanical mock-up. 9th VXD workshop, Sep 8th,2015, Trieste. 3

Mock-up: FOS set-up 4 9th VXD workshop, Sep 8th,2015, Trieste.

Mock-up: FOS set-up:Fibres 5 9th VXD workshop, Sep 8th,2015, Trieste. FiberNº of sensorsProtectedParameter Monitoring fibers 514Teflon TubeTemperature 524Teflon TubeTemperature 534Teflon TubeTemperature 394noneTemperature+humidity Reference fibers Ref1_15721Metal tubeTemperature Ref Metal tubeTemperature F432noneHumidity + Temperature F442noneHumidity + Temperature

Mock-up: Monitor FOS position 6 9th VXD workshop, Sep 8th,2015, Trieste. Ladder 2.5 Ladder 2.11 Fiber 53 Fiber 39 Fiber 52 Fiber 51

Mock-up: Reference FOS position 7 9th VXD workshop, Sep 8th,2015, Trieste. Humidity Reference Fiber 43, 44 Ref2_1548 temperature reference

Mock-up: First results: Temperature monitoring — Temperature monitoring F51 sensors during thermal test. 9th VXD workshop, Sep 8th,2015, Trieste. S1S2 F52 F51 S3 S4

First results: Humidity Reference Fiber 9 9th VXD workshop, Sep 8th,2015, Trieste. — Humidity reference sensor measures accurately Humidity change when the dry volume is open after temperature effect compensation Under thermal stability conditions

Mock-up: F39 Stress problems — Fiber 39 ( sensitive to temperature and humidity) stressed, problems disentangling humidity effect. 10 9th VXD workshop, Sep 8th,2015, Trieste. Fiber released Fiber cable manipulation ( outside the dry volume) Fiber released again

Mock-up: F51-F52 Stress problems — F52 and F51 seems to be a little bit stressed ( not comparable with F39, only about 30 pm effect) 11 9th VXD workshop, Sep 8th,2015, Trieste.

FOS for Beas II 9th VXD workshop, Sep 8th,2015, Trieste. 12

Beast II Test Beam 13 9th VXD workshop, Sep 8th,2015, Trieste. — Beast II have been delayed ( commissioning of BEAST II February 2017??) — Next year Beast II silicon sensors will be proved in a Test Beam at Desy (april 2016??) — Proposal for integration of FBG fibers in FANGS (FE-I4 ATLAS Near Gamma Sensors) in order to measure temperature and humidity during test beam. 2 fibers with several sensors along the aluminium frame

Beast-II monitoring with fibers 14 9th VXD workshop, Sep 8th,2015, Trieste. — Temperature + humidity measurements on FANGS Stave support ( similar to the proposed for TB). — Temperature measurement along Beam Pipe on different points — Beam pipe – cartridge relative radial vibration measurement using L-shapes.

Beast-II monitoring with fibers 15 9th VXD workshop, Sep 8th,2015, Trieste.

Beast-II Hardware 16 9th VXD workshop, Sep 8th,2015, Trieste. — Temperature and Humidity measurements: _ Fibers geometry must be defined and fibers the must be ordered and delivered (4 months) _ Once fibers received they must be prepared and calibrated with temperature and humidity (2 months) _ Fibers fixation must be studied carefully (2 months) — Displacements / Vibrations measurements _ L-shapes are manufactured _ The clamp must be design, and the contact ball must be glued (1 month) _ L-shapes must be tested with humidity ( 3-4 days test) (2 weeks) _ L-shapes calibration (2 weeks)

Beast-II Software 17 9th VXD workshop, Sep 8th,2015, Trieste. — In collaboration with Michael Ritcher: Readout integrated in epics similar to 2014 test beam ( it is expected to be integrated smoothly) — Temperature and humidity and displacement measurements not a problem — Study the possibility of measuring vibrations with L- shapes: _ Interrogation speed 1 KHz. Write 1 frequency spectrum each 60 seconds with 0.1hz resolution (0-500 Hz,5000 points)

FOS schedule for Beast-II 18 9th VXD workshop, Sep 8th,2015, Trieste octnovdicenefebmarabrmayjunjul FOS fibers design and delivering Fibers calibration Fibers fixation studies L-shape clamp design and manufacture L-Shape humidity test L-Shape calibration

Conclusions 19 9th VXD workshop, Sep 8th,2015, Trieste. — First Depfet mock-up results: FBG fibers seems to be feasible to measure temperature and humidity _ Temperature fibers must be prepared more carefully or use acrylate fibers in order to avoid humidity sensitivity _ Fibers locking must be studied very carefully in order to avoid stress effect. — For next year some fibers positioned in the FANGS aluminum support structure ( a hole can be made all along the stave for fibers positioning) in order to measure temperature and humidity during Test beam. — A first proposal for beast II temperature, humidity and displacement monitoring have been presented. More iterations needed with Depfet collaboration in order to define the final system.