Optical Position sensor (Finishing) Diamond Detector for Secondaries - PowerPoint PPT Presentation

Projects Review: Optical Position sensor (Finishing) Diamond Detector for Secondaries (Starting) Meeting - Wire Scanner Electronics 15/03/2013 Jose Luis Sirvent PhD. Student

1. Optical Position Sensor • A)Electronics (Schematic): Laser Diode Circuit Driver **PL13AS001ST61-S-0** (Limited Voltage Controlled Current Source) R6 100k V1 7 7 R1 LD PD R23 50 R24 50 5Vdc 7 7 3 3 40k U8 U9 V+ V+ 0 + + 3 3 U7 D3 U6 V+ V+ Q3 + + 6 6 D1N4148 R4 100k VDiagnosticsLD 0 AD8028 OUT 0 AD8028 OUT 6 6 0 R2 AD8028 AD8028 OUT OUT 2 2 10k R5 100k - - 2 2 4 4 2N2222 - - V- V- 4 4 V8 R15 1k V9 0 V- V- -5Vdc -5Vdc 0 VControlLD_0-1V 0 0 0 0 R3 1k R7 100k R8 28 R14 2k R16 1k AD8028: Low Distorsion, High Speed 190MHz, Rail to Rail Input/Output 0 Ampliffier. Single supply 2.7V to 12V PL13AS001ST61-S-0: Laser Diode 1310nm, Optical Power 2mW, Max If 35mA, Max Reverse Voltage 2V. Photodiode **PTINS155ST83** Circuit Driver for ADC (High Speed Differential to Single-ended signal for ADC 0-1V with double thresshold comparator s) PTIN155ST83: InGaAs PIN TIA PD, R13 10M Bandwidth 175MHz, Vsupply 5V, Differential Output signals, Offset V3 5Vdc 5Vdc V6 7 3.9V, Max Diff output signal 1Vpp, 7 U10 R12 10K Opetating Current 35mA 3 0 3 U2 V+ V+ R10 383 + V+_PTINS155ST83 + 0 6 6 0 TTL_Signal_A_0-5v AD790 OUT AD8028 OUT R1840k 2 V5 2 - 7 5Vdc 4 - 4 V14 V7 V- V- -5Vdc 3 0 5Vdc 0 Pot_A V+ + R9383 10k 6 0 AD8028 OUT R17 2 0 A/D_Conv _0-1V R21 10M V4 5Vdc 1k 0 - V12-5Vdc 4 7 R20 383 V- 3 5Vdc V10 V+ 7 V-_PTINS155ST83 + 0 U11 R19 10K 0 3 0 6 V+ 0 + R11 383 AD8028 OUT 6 2 TTL_Signal_B_0-5v AD790 OUT - V13 R2240k 4 -5Vdc 2 V- - 4 V11 V- 0 5Vdc 0 Pot_B 10k 0 0 Title <Driv ers f or Laser Diode (PL13AS001ST61-S-0) and Photo diode (PTINS155ST83) > Size Document Number Rev A <Version 1.0> Date: Wednesday , February 27, 2013 Sheet 1 of 1

1. Optical Position Sensor • A)Electronics ( LD_Driver Simulations): – Red: V_Diagnostics (From integrated PD) – Green: V_Control LD Damaged LD Working properly

1. Optical Position Sensor • A)Electronics ( PD_Driver Simulations): - 3dB @ 87.8MHz Slits 10um @ 200rad/s (640KHz) Slits 5um @ 200rad/s (1.4MhZ)

1. Optical Position Sensor • A)Electronics ( PD_Driver Simulations): Signals 1MHz Signals 50MHz

1. Optical Position Sensor • A)Electronics ( PD_Driver Testing):

1. Optical Position Sensor • A)Electronics ( Appearance):

1. Optical Position Sensor • B) Tolerancing the system: – Focusers 180deg (Which tolerance?) (0.25 deg  Calib error ~ 6uRad) – Focusers Equidistant with centre or rotation (Which tolerance?) (0.1mm  Calib Error ~1uRad ) Fits well with: 1.4 deg displacement Real displacement references: 1.38deg

1. Optical Position Sensor • C) Re-Validation of the System (Calibration & Validation Methods): – 1.) Calibration & Validation with RON 225 (Not possible to see error of RON225, reliable validation?) • Accuracy = 24uRad (Already in our desired limit) – 2.) Calibration & Validation with Second Focuser (Not possible to see alignment errors, reliable validation?) • If perfectly aligned then we could asume complete eccentricity compensation. • Scale accuracy?, Detection error?, higher harmonics compensation? – Measurements 1 & 2 remove “Eccentricity” and sees how repeatable are the following turns respect to the calibration turn – 3.) Calibration with Second Focuser & Validation with RON225 (We see a combination of errors RON225 & Focusers alignment) • Alignment, Accuracy Ron225, Detection error, Scale error,

1. Optical Position Sensor • C) Re-Validation of the System (Calibration & Validation Methods): – Speed: 64rad/s , Alignment: 0.58deg, Spot 20um, Track 10um

1. Optical Position Sensor • C) Re-Validation of the System (Calibration & Validation Methods): – Speed: 203rad/s , Alignment: 0.58deg, Spot 20um, Track 10um

1. Optical Position Sensor • C) Re-Validation of the System (Calibration & Validation Methods): – Speed: 290rad/s , Alignment: 0.58deg, Spot 20um, Track 10um

2. Diamond detector for secondaries • A) Trying to model Electronically the detector for Minimum Ionizing Particle: pCVD For a MIP particle generated charge 1.52FC: Pulse: I=1.67uA t=1.05ns Definition of MIP: Type of particle? Proton, Electron, Pion… Energy of a MIP particle? From Bend’s & E. Griesmayer articles Please: Correct me If I’m there is any mistake

2. Diamond detector for secondaries • A) Trying to model Electronically the detector for Minimum Ionizing Particle: LHC Bunch spacing 25ns

2. Diamond detector for secondaries • B) Estimation of the Beam interaction with wire: – Approximation 1: Mariusz Sapinski 2007 – Considers: Wire Speed, Wire Diam, Beam profile, Bunch & Turn period – But playing with the equations it’s simplified to : * Efficency Factor

2. Diamond detector for secondaries • A) Estimation of the Beam interaction with wire: – Approximation 2: A. Lechner 2013 – But provides simulations of Fluency Secondaries & Dose that could take already Eff. Factor into account Alternative Protocol: 1. Extraction of each particle fluency per Bunch 2. Evaluation of Bethe-Bloch equation for each particle type to obtain stopping power per um. 3. Calculate charge generated for each particle type in the pCVD per bunch 4. Sum of all particle charges contribution to obtain total charge per bunch. Charge to  Total max current 5. Pulse time  Rise+Falling+Width MIP 6. + Bunch duration Suggestions to calculate max current from the deposited dose?

2. Diamond detector for secondaries • C) Proposed short term planing:. – Develop a complete electronic model of the sensor. – Finish the estimation calculations for the generated charge in the detector for dynamic range determination. – Validate the electronic model estimated with real measurements in the laboratory (Capacity & Resitance). – Study different (rad-hard) possibilities/strategies for the high dynamic range pre-amplification of the diamond detector signal before it’s transmission through long cables. – Study the impact of long cables in the signal delay, shape and SNR. – Determine which cable should be used to transport the detector signal to subsequent electronics. – Evaluate different possibilities for Back- end electronics (Amplifiers, shapers, integrators…) – Study different digitalization schemes to allow high dynamic range with the maximal resolution possible and bunch by bunch information. – I have to send the 6 months DOCT_Progress Report before 29/03/2013 • Small document 1-2 pages. • I’ve already writen a draft but one part has to be writen by supervisor (Bernd, Jonathan?)