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NPL

Nuclear Physics Lab

NPL
HPGe Systems

HPGe Systems

Author: Tim

This page is dedicated to providing a step-by-step setup of an HPGe system

The graded shield uses 4-inch thick walls of low background lead, layered with tin and copper to suppress x-rays excited by the lead.
There is a small hole at the bottom of the shield for the HPGe cryogenic dip-stick to exit the shield and enter the externally held liquid nitrogen.
A small slot permits the necessary cabling to also enter the shield. These include the detector HV, preamp power, test signal in, energy pulse out, and HV inhibit out.
The preamplifier is house in the bottom section of the detector.
Slowly lower through the shield into the dewar.
The underneath view.
The fully seated detector.
Back
  • NPL-Home
    • About Us
    • Accelerators
      • Betatrons
        • Plasma Betatron Coil Form: Design and Construction
        • Pulsed B-Dot Measurement
        • CW B-Dot Measurement
        • First Beam Attempts
      • Cyclotrons
        • 12-Inch Cyclotron
        • Axial Betatron Motion
        • Floating Wire Technique
        • 12-Inch Cyclotron Papers
      • DC Potential Drop
    • Experiments
      • Alpha Spark Detector
      • Jay’s Diffusion Cloud Chamber
      • Tim’s Wilson Cloud Chamber
      • Deuterated Target Preparation
      • Gamma-Gamma Coincidence
      • Measurement of excited Np237 half-life via the alpha-gamma coincidence method.
      • MUONS
        • Life & Times of a Muon
      • Neutrons
        • Neutron Diffusion Time Measurement
        • Neutron Induced Gamma Rays
        • Neutron Detection with He-3
      • Photography
        • AVCO Rotating Mirror
        • Dark Room
        • Fast Flash Photography
        • Rotating Drum Camera
        • Schlieren Photography
        • X-Rayted Photos
      • Rutherford Scattering
      • Thermoluminescence
    • History
      • The Kerst Collection
      • Heisenberg Cube
      • Koeth Collection – Consumer Products
      • Koeth Collection – Radiation Detection Instruments
      • Koeth Collection – Reactors & Weapons
      • Koeth Collection – Games & Collectables
    • High Voltage & Pulsed Power
      • Blue Thunder
      • Jacob’s Ladder
      • Krytrons
      • Marx Generator
      • Electric Watermelon
      • Tesla Coils
        • Jay’s Tesla Coil
        • Variacs
      • Quarter Crushing
    • Plasma
      • Fusors
        • FUSOR I
        • FUSOR II
        • Scott's Fusor
        • Fusor Simulations
      • The Mirror Machine
      • Pinch Machines
        • Linear Pinch
        • Toroidal Pinch
        • Pinching
    • Spectroscopy
      • Alpha Particle Spectroscopy
      • Gamma Ray Spectroscopy
        • HPGe Gamma Ray Spectroscopy Education
        • HPGe Systems
        • Cosmogenic Be-7
        • NAS Wildwood Mystery
        • Autunite
        • Trinitite
        • Tc-99m : Cardiac Stress Test
      • Software & Hardware
        • Refurbishment of LN2 Dewars
        • DIY Matlab MCA
        • Amateur Canberra Spectroscopy System
        • Antique MCA
        • NIM Modules
          • Canberra Nim Modules
          • ORTEC Nim Devices

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