Scanning TCT System

 

Particulars Scanning TCT System is a complete setup for measurements of transient currents generated in semiconductor sensors with narrow laser beam. It can be used for standard and Edge-TCT measurements. Edge-TCT enables measurements of charge collection and carrier velocity profiles – crucial for understanding the performance of heavily irradiated detectors.

SCANNING-TCT-SYSTEM

Features

  • Wide band current amplifier
  • Bias-T
  • High voltage low pass filter
  • Laser diode (650 nm, 1064 nm)
  • Programmable laser driver for sub-nanosecond laser pulses
  • Laser beam optics, beam spot 8 μm FWHM
  • XYZ moving stages for precise DUT positioning in the beam and focus tuning
  • Water cooled Peltier mounting block for DUT temperature control 
  • Aluminium closure for light and RF shielding and atmosphere control 
  • Dimensions: 80x40x40 cm
  • Weight: 20 kg
  • Hardware control software (connection via USB)
  • Data acquisition software
  • ROOT based package for data analysis

 

Scanning-TCT-amplifier

Amplifier

• Bandwidth 0.01 - 2000 MHz
• Bias 6 - 15 V
• Amplification 35 dB or 53 dB
• Input, output impedance: 50 Ω
• Dimensions: 7x5x1.5 cm3

Scanning-TCT-biast

Bias-T

• Max voltage 1 kV
• Freq. range: 0.01 - 2000 MHz
• Input, output impedance: 50 Ω
• Dimensions: 7x5x1.5 cm3

Scanning-TCT-HVlowpassfilter

HV Low-pass filter

• Filter high frequency
  interferences from HV power
  supplies
• Max voltage 2 kV

Fibre coupled laser with optics on translation stage

• Laser diode 660 nm or 1064 nm 

Scanning-TCT-fiber• Tunable pulse width 0.4 ns - 4 ns

• Tunable pulse power equivalent to 10 MIP - 100 MIP in Si

• Single pulse mode 50 Hz to 1 MHz

• 1024 bits deep pulse sequence

• NIM logic trigger output

• NIM external trigger

• USB control

 

Sample mounting

• Aluminium support block on XY translation stage:
< 1 μm precision, 2 kg load, 5 cm range
• Block fixed to water cooled Peltier element
(40 W, ΔT ~ 40 °C)
• PT100 for temperature measurement

Scanning-TCT-sample-mounting

 

Software

Executables with GUI for complete measurement

control: Laser control, stage movement, data
acquisition
ROOT based package for analysis of TCT signals

Scanning-TCT-software

 

Beam Intensity Monitor

 

BEAM-INSTENSITY-MONITOR

Transmissive photodiode: DDS1- XXX/X

The DDS1 photodiode is used for diagnostic X-ray applications

  • P-on-N silicon detector
  • Two available square active area: 5x5 mm2 or 10x10 mm2
  • Thickness: 10 μm
  • Very high transmission in a wide range of energies
  • No external voltage is needed for operation
  • Dimensions: 41x68x12 mm3

  • Easily mounted in experiment

  • The beam intensity is measured by output current

  • Depletion layer thickness (bias = 0): 7 µm

 

General Features

DDS1 photodiode is based on a Silicon detector fabricated on a 10 μm thick substrate. Because of the low noise (dark current, in the pA range), very low radiation intensities can be measured reliably. Si photodiode has good responsivity uniformity and provides a good stability after burn-in.

 

Specifications (electro-optical characteristics at 25ºC)

Model No.

Active area

(mm2)

BreakdownVoltage(1)(V)

DarkCurrent(2) (pA)

CapacitanceC(2)

(nF)

ShuntResistance

(MΩ)

SensitivityS(3)

(A/W)

Max storage Te(oC)

AS04-110A

10x10mm2

68.9

16.7

1.20

0.275

230

0.035

80

AS04-105A

5x5mm2

28.1

14.6

0.13

0.123

420

 (1): 1 µAReverse current, (2): measured at 0V, (3): measured at 8 keV

 

Experimental results

Wide energy range. Transmission level above 80% at 8 keV and 94% at 12 keV.
Responsivity uniformity better than 5% inside the active area.

 

Bean10Imagen2 beam

 

Drawing - packaging

Bean4 2

printed circuit board
A-anode, C-cathode

bean7 2bean8 2

5x5 mm2 and 10x10 mm2 Si photodiode

Accessory P1 (optional)

 

Bean5Bean6beam11 

Optional packaging
Two Lemo connected(ERN.00.250.GTL)
Actived area limited to 50.25 mm2
Two interchangeable kapton windows

 

Nomenclature

The photodiodes follow the below nomenclature.

All part numbers start with:

[chip area]mm2

[optional packaging]

[]

Value

[]

Value

1010

100

P1

 

1005

25

   

 

Typical applications

Diagnostic X-ray applications and real-time X-ray beam position monitor for synchroton beamlines

Application circuit:


beanapps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Further information

Contact us: This email address is being protected from spambots. You need JavaScript enabled to view it. or This email address is being protected from spambots. You need JavaScript enabled to view it. 
Other specifications are available on request
This product is sold under license of Spanish National Research Council (CSIC) And Alba Cells Synchroton (Spain)
Rev. 2.1 specifications subject to change without notice

 

Laser System

LASER-SYSTEM

 

The Alibava Laser System is a low power class 1 laser source ideal to work with silicon detectors. The detector characterization, the detector's strip structure, the strips charge sharing or the spatial resolution are some examples of the measurements possible with this equipment.
The Laser System includes a driver to use the laser diode in pulse mode with an external trigger signal. For each trigger pulse, the laser generates a 5 ns width pulse with a rise time of 1 ns. An optical focuser is included as well to help the user to direct the optical signal to a micrometric spot on the target detector. This equipment is compatible with the Alibava System Classic ASC.

 

General features

  • Class 1 laser diode
  • Diode Peak power: 0.5 mW
  • Wavelength: 980 nm or 1064 nm
  • FC/APC Optical connector output
  • Input trigger Lemo connector
  • Power supply 5V DC
  • Plug and play
  • Laser driver:
    • 5 ns Pulses width
    • 1 ns rise time

System contents

  • 1 Optical focuser:
    • 12 mm Focal distance
    • 20 μm laser spot
  • 1 Fiber optic cable:
    • To connect the laser output with the focuser
  • 1 Lemo cable 1 power supply (+5 V AC/DC adaptor)
    • To connect the input trigger with your trigger source
  • 1 FC/APC to FC/APC connector

software-alibava

 

 

Alibava System Classic downloads


software-easy

 

EASy downloads