3rd NoRDHia 1 TITLE INVESTIGATION OF A SINGLE CRYSTAL DIAMOND SENSOR AND ITS APPLICATION IN BACKGROUND MEASUREMENTS FOR HERA Wolfgang Lange, DESY Zeuthen
3rd NoRDHia 2 OUTLINE OF THIS TALK 1.Motivation 2.The Sensor 3.Measurements 1.Static Measurements 2.Particle Detection (Source) 3.Charge Collection during Irradiation 4.Results 5.Outlook Wolfgang Lange
3rd NoRDHia 3 MOTIVATION Wolfgang Lange Investigation of one of the first available single crystal diamond sensors Not only measurement of properties but also practical use in an application to achieve experience Extend this application into environments with radiation load later
3rd NoRDHia 4 SENSOR Wolfgang Lange Single Crystal (CVD grown on substrate) by E6 About 5 by 5 square millimeters Metallization 3 mm in diameter Thickness 320 µm Connected via ultrasonic Al bonding
3rd NoRDHia 5 MEASUREMENTS (1) Wolfgang Lange Diamond Keithley 487 HV N2N2
3rd NoRDHia 6 MEASUREMENTS (2) Wolfgang Lange
3rd NoRDHia 7 MEASUREMENTS (3) Wolfgang Lange Charge Collection Distance: CCD reaches 50V (100% efficiency, thickness = 320 µm)
3rd NoRDHia 8 MEASUREMENTS (4) Wolfgang Lange Charge Collection Distance: 80V (100% efficiency, thickness = 320 µm), measured for low doses (Sr90)
3rd NoRDHia 9 RESULTS Wolfgang Lange 100% charge collection efficiency, CCD = thickness Stable for low doses Clearly separated spectrum of minimal ionizing particles 1 mip results in 11.5 ke - (1.84 fC)
3rd NoRDHia 10 OUTLOOK Wolfgang Lange application of this sensor in particle counting: use of a preamplifier, put it in a box, interface electronics appointed application: radiation monitor (HERA, Zeus)