Summer Student Presentation .


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Summer Student PresentationKim Temming. 2. Layout. motivation behind my task diode BPW34F/BPW 34 how to gauge radiation with this diodes? history of my estimations illuminations first setup estimations/results issues new setup estimations first results issues first conclusions standpoint.
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Slide 1

Summer Student Presentation Radiation Monitoring with business p-i-n diodes BPW34F Summer Student Project of Kim Temming Supervisors: Michael Moll Maurice Glaser By Kim Temming

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Outline motivation behind my venture diode BPW34F/BPW 34 how to quantify radiation with this diodes? history of my estimations illuminations first setup estimations/comes about issues new setup estimations first outcomes issues first conclusions standpoint Summer Student Presentation Kim Temming

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Purpose of my Project examine the likelihood to utilize business BPW 34 p-i-n diodes as dosimeters for LHC analyses and light offices points of interest business item: low costs (1.60 € ) powerful and simple to deal with vast fluence extend (10 12 – 10 15 p/cm 2 ) measuring NIEL (removal harm) weaknesses needs qualifying temperature & fluence reliance toughening readout plot business item (no impact on creation) Summer Student Presentation Kim Temming

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Diode BPW34F/BPW34 business SI-stick diode/shoddy BPW34 photosensitive from 400nm to 1100nm (BPW34F: 950nm) applications: IR remote controls photointerruptors control and drive circuits BPW34 - photosensitive zone + BPW34F Summer Student Presentation Kim Temming

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How to quantify radiation? increment of voltage with fluence for steady current when one-sided in forward heading Summer Student Presentation Kim Temming

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My Work: Irradiations 102 diodes were illuminated with 24 GeV/c PS proton bar 50 BPW34F from USA 1.0 E15, 0.5 E14, 0.3 E14, 1.0 E14, 0.5 E13, 0.3 E13, 1.0 E13, 0.5 E12, 0.3 E12, 1.0 E12 (all in p/cm 2 ) 22 BPW34F from MALAYSIA 1.0 E15 ppcm 2 , 1.0 E14 p/cm 2 BPW34 Siemens, BPW34 Osram and BPW34FS every 5 pieces 1.0 E13 p/cm 2 every 5 pieces 1.0 E14 p/cm 2 lights fruitful in cutoff points of 20% inconsistencies to needed fluence (+ca. 8% mistakes on qualities) Summer Student Presentation Kim Temming

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First Setup aluminum box/totally dim (diodes are delicate to light!) Keithley 2400 set current/perused voltage sensor for temperature inside box/2 cm alongside diode affectability: 0.1 degree celsius labview program choice for steady current alternative for beat current showcases diagram: voltage time Summer Student Presentation Kim Temming

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Measurements/comes about first setup VI estimations of all examples before illumination current between 0.1 A and 1 m A consequences of VI estimations before light: almost all specimens demonstrate same trademark all contrasts between tests get to be distinctly bigger with higher current examples from Siemens: old (a few years) fluctuate over 20% examples siemens Summer Student Presentation Kim Temming

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Measurements/comes about first setup reliance of the voltage on readout recurrence and readout beat length 10 tests together lighted with 1.0 E14 protons/cm 2 connected current: 1 m A heartbeat length shifting between 1 m s and 1 s heartbeat to heartbeat time between 60 s and 3 s Results of reliance on readout recurrence & beat length not exceptionally touchy to heartbeat length (aside from of consistent current) not in the least touchy to time between heartbeats however contrasts of more than 20 % between the diverse diodes Summer Student Presentation Kim Temming

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Measurements/comes about first setup reliance on readout current ONE diode illuminated with 1.0 E14 protons/cm 2 heartbeat to heartbeat 3 s, beat length fluctuating current shifting between 1 A and 100 m A Results of reliance on readout current Summer Student Presentation Kim Temming

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Problems of first setup diodes are extremely touchy to temperature measured voltage depends particularly on the temperature of diode temperature is measured 2 cm far from diode/ secluded by plastic and air conceivable wellsprings of temperature contrasts changes of room temperature (ventilate!) touching of diodes opening of box another conceivable clarification: diodes indicate peltier impact chilling off by applying current important to control temperature of diode precisely Summer Student Presentation Kim Temming

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New setup peltier component underneath attachment of diode directs temperature of diode to precisely 19.3  0.01 degree celsius temperature read out by little temperature sensor (worked with Keithley 2410) readout of diode still with Keithley 2400 temperature showed on web with webDAQ/100 Summer Student Presentation Kim Temming

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Measurements with new setup ONE diode lighted with 1.0 E14 protons/cm 2 constantly same end an incentive with consistent current first no room temperature impacts (outside box) noticeable in view of the great temperature protecting over night/end of the week estimations illuminated diode non illuminated diode exceptionally temperature stable resistor estimations: connected current: 100 A, steady current temperature measured inside and fresh with 2 digits voltage measured with labview-program and Keithley 2400 Summer Student Presentation Kim Temming

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First outcomes (new setup) lighted diode: voltage as yet relying upon temperature yet extremely delicate not lighted diode: same outcomes but rather less abundancy 1 k Ohm resistor Summer Student Presentation Kim Temming

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Problems of temperature/Keithleys not totally clear yet: impact of temperature in diode? impact of room temperature in Keithleys? breaking point of keithley precision! Summer Student Presentation Kim Temming

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First conclusions before illuminations: all diodes near one another, exclusive couple of inconsistencies on readout voltage after light: diodes indicate errors of up to 20% on readout voltage diodes exceptionally temperature delicate temperature should be controlled best readout plot: current: 100  A heartbeat length: 1 m s heartbeat to beat: ~ 3s (not extremely touchy) Summer Student Presentation Kim Temming

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End Outlook proceed with estimation more extraordinary gadgets (to get insights) more touchy temperature control reliance on the readout temperature for fluences 1.0 E12...E15 p/cm 2 from –10 C to +30 C reliance on the fluence 1.0 E12 p/cm 2 up to 1.0 E15 p/cm 2 strengthening of tests in stove 40, 60. 80, 100 degree celsius Summer Student Presentation Kim Temming

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