Products | Vitus H7 SDD

10 mm² collimated to 7 mm²
X-Ray Silicon Drift Detectors for
EDX  -  XRF  -  TXRF  -  Applications

KEY PARAMETERS VITUS H7

Class PremiumStandard
Energy Resolution < 133 eV< 139 eV
Peak to Background> 10000> 6000
Peak to Tail > 2000> 1000
Absorption Depth          450 µm Si
Peak Shift Stability
up to 100 kcps		          
          < 1eV
Max. input countrate          500.000 cps
Windows  E > 1 keV
              E > 250 eV		          8 µm Be
          AP3.3
Cooling Performance          ∆T > 75 K
Collimator Materials          Zr - Pd - Mo
REGISTER HERE AND GET THE DETAILED
PRODUCT INFO DATA  SHEET
State of the Art Detector for Your Application
VITUS H7 SDD
VITUS H7 SDD

Short facts

The plot on the right shows a spectrum acquired with a VITUS H7 Premium Class SDD at a cooling power of 3W and a SDD chip temperature of -55°C. Typically FWHM < 133eV at 5.9keV can be achieved. Features of the VITUS H7 SDD are:

  • guaranteed energy resolution of < 133eV (premium class)
  • excellent peak to background and peak to tail
  • low capacitance for high count rate capability up to 500 kcps
  • integrated multi stage peltier element
    with very good cooling efficiency
  • low leakage current
  • radiation hardness during more than
    10 years standard count-rate exposure
  • very good peak shift stability
  • "easy to use" - no voltage adjustment needed


Energy Resolution

to the top

The energy resolution of the VITUS H7 SDD is dependent on the operating temperature and the shaping time. To achieve good results, KETEK recommends an operating temperature below -20°C. Typical operating conditions are -35°C and an analog shaping time of 4 µs.

The temperature dependency is more significant for longer shaping times.

Finding the optimum operating conditions depends very much on ambient temperature and count rate for the specific application.


Count Rates

to the top

The VITUS H7 SDD detector offers a high count rate capability up 500 kcps with weak FWHM dependency as shown in the graph for different analogue shaping times.

The data of the example plot has been acquired with a VITUS H7 Standard Class detector at an operating temperature of -35°C.

The plots show values up to the maximum reasonable dead time of 60%.

 

 

 

  


Operation

to the top

  • pin wiring according VITUS Operation Block Diagram
  • detector operating voltages should be RC low-pass filtered and linear regulated (KETEK electronics recommended)
  • KETEK reset type charge sensitive preamplifier with internal triggered reset pulses recommended
  • short wiring length between detector and preamplifier recommended
  • detector may only be operated with an appropriate heat sink

VITUS Operation Block Diagram
VITUS Operation Block Diagram

SDD Voltage and Current Requirements

Operation Requirements
SDD Voltages and Currents
Ring1 (R1)  -20 V ± 5 V 10 µA typ.
RingX (RX)  -130 V ± 20 V 10 µA typ.
Back  -60 V ± 5 V <1 nA

Voltage Requirements of the included FET

Operation Requirements
Included FET
Drain 3 V ± 0.5 V  3 mA
Source 0 V
Bulk -5 V ± 3 V
Reset 1 V  1 µs
Feedback ramped output

Operation of TEC and Temperature Monitor

Operation Requirements
Peltier Element 4 V 1 A max
Temperature Monitor slope 2.40 mV/K
520 mV @ +20°C		 1 µA

VITUS H7 Pin Assignment
VITUS H7 Pin Assignment

 


Geometries

to the top

The VITUS H7 SDD is encapsulated with a bevelled cap for optimum beam geometries in your application. The used TO8 housing can be easily mounted by the M4 stud. 

VITUS H7 Detector Geometry
VITUS H7 Detector Geometry

Versions and Ordering Codes

to the top

Available versions and ordering codes for the VITUS H7 SDD:


The vacuum type codes end with a 'V' - e.g. 133V

 


Accessories

to the top

Available KETEK Signal Processing Electronics