1. 3rd NoRDHia Workshop @ 1 TITLE INVESTIGATION OF A SINGLE CRYSTAL DIAMOND SENSOR AND ITS APPLICATION IN BACKGROUND MEASUREMENTS FOR HERA Wolfgang Lange, DESY Zeuthen

2. 3rd NoRDHia Workshop @ 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

3. 3rd NoRDHia Workshop @ 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

4. 3rd NoRDHia Workshop @ 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

5. 3rd NoRDHia Workshop @ 5 MEASUREMENTS (1) Wolfgang Lange Diamond Keithley 487 HV N2N2

6. 3rd NoRDHia Workshop @ 6 MEASUREMENTS (2) Wolfgang Lange

7. 3rd NoRDHia Workshop @ 7 MEASUREMENTS (3) Wolfgang Lange Charge Collection Distance: CCD reaches maximum @ 50V (100% efficiency, thickness = 320 µm)

8. 3rd NoRDHia Workshop @ 8 MEASUREMENTS (4) Wolfgang Lange Charge Collection Distance: CCD @ 80V (100% efficiency, thickness = 320 µm), measured for low doses (Sr90)

9. 3rd NoRDHia Workshop @ 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)

10. 3rd NoRDHia Workshop @ 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)