1. Double Chooz Neutrino Project: Slow Monitoring and Recording System
Louisiana Tech University
Double Chooz Neutrino Project: Slow Monitoring and Recording System
Students:
Richard Chevious (Senior - Louisiana Tech University )
and James Hazelton (Junior - Oklahoma State University)
Advisor:
Dr. Glenn Horton-Smith

2. Purpose
Background
Materials
Projects
Results
Conclusion
References
Purpose
To design and test certain aspects of the Slow Monitoring and Recording system for the Double Chooz neutrino project, focusing on the system of temperature and magnetic field sensors which will monitor the status of the final detector.

3. Why?
Neutrinos are probes into many cosmological events such as supernova and nuclear processes at the center of stars.
With this information, scientists can gain a better understanding of the universe.

4. Purpose
Background
Materials
Projects
Results
Conclusion
References
Background
Neutrinos
Neutrinos are elementary particles that weakly interact with normal matter and move at nearly the speed of light. Their properties make them important as a probe into the processes inside of the Sun or in a nuclear reactor.
Elementary particle
Interact through the weak force and gravity
First theorized in1930 by Wolfgang Pauli
First discovered in1956 by Clyde Cowan, Frederick Reines, F. B. Harrison, H. W. Kruse, and A. D. McGuire.
There are three types of neutrinos: electron (ne), muon (nm) and tau (nt)
Electric charge: 0
Spin: 1/2
An example of b- decay
Reactor Neutrinos are produced by nuclear beta decay.
Provided by Reference 2.

5. Background Neutrino Detection
Purpose
Background
Materials
Projects
Results
Conclusion
References
Background
Neutrino Detection
A process called inverse beta decay is used to detect neutrinos.
The process entails a proton and an antineutrino collision creating a positron and neutron. (Shown in the equation above.)
Then, a positron and electron annihilate to produce two or more photons which are detected. (Shown in the equation above.)
Provided by Some Doctors.

6. Background Double Chooz Provided by Reference 1.
Purpose
Background
Materials
Projects
Results
Conclusion
References
Background
Double Chooz
Double Chooz is investigating the value of the q13 neutrino mixing angle. They want to measure this angle within the range of 0.2 to within three years of data taking. In order to achieve this scientific goal the detectors need monitoring systems to ensure 1% or less error in measurements.
Provided by Reference 1.

7. Materials HMC2003 Three-Axis Magnetic Sensor Hybrid
Purpose
Background
Materials
Projects
Results
Conclusion
References
Materials
HMC2003 Three-Axis Magnetic Sensor Hybrid
DS18S20 High-Precision 1-Wire Digital Thermometer
DS Wire Quad A/D Converter
Buffer Oil
Thermally Conductive Epoxy
Clear Epoxy
Solenoids
Clear Acrylic

8. Solenoids, which we used to create uniform magnetic fields.
Purpose
Background
Materials
Projects
Results
Conclusion
References
Materials
Solenoids, which we used to create uniform magnetic fields.

9. Materials 4-Channel ADC:
Purpose
Background
Materials
Projects
Results
Conclusion
References
Materials
4-Channel ADC:
Converts the sensors’ analog signal into digital form
Also used for triggering the set/reset circuit
3-Axis Magnetic Field Sensor:
OneWire compatible magnetic field sensor with a range of +/-2.5 Gauss
DS1820 Thermometer:
OneWire compatible programmable resolution thermometer
Provided by Reference 4.

10. Projects Testing and calibrating sensors
Purpose
Background
Materials
Projects
Results
Conclusion
References
Projects
Testing and calibrating sensors
Compatibility testing of components and epoxies with buffer oil
Designing the Set/Reset circuit and improving the software interface
Fabricating the mount unit for sensors
Designing and building the integrated circuit board
Testing prototype

11. Purpose
Background
Materials
Projects
Results
Conclusion
References
Set/Reset Circuit
When the magnetic sensors encounter a large magnetic field, the magnetic domains begin to skew, producing inaccurate readings.
Solution: Create a circuit which will reset the domains periodically.
Magnetic Domains for Magneto-resistive element.
Provided by Reference 4.
Both provided by Reference 4.
Set/Reset pulse
Diagram for an S/R Circuit

12. Prototype PCB for Sensors
Purpose
Background
Materials
Projects
Results
Conclusion
References
Prototype PCB for Sensors
Key:
Green: Bottom of Board
Yellow: Outline of Components
Red: Top of Board
Picture of PCB

13. Prototype Mount for Sensors
Purpose
Background
Materials
Projects
Results
Conclusion
References
Prototype Mount for Sensors
Sensors in a box
Holes
Cable
Cable
Box
PCB Board with Sensors
Picture of Mount with Sensors

14. Preliminary Placement of Sensors in the Tank
Purpose
Background
Materials
Projects
Results
Conclusion
References
Preliminary Placement of Sensors in the Tank
Mounts for Sensors

15. PMT Dimensions (Lengths given in mm) Provided by Reference 3. Purpose
Background
Materials
Projects
Results
Conclusion
References
PMT Dimensions
(Lengths given in mm)
Provided by Reference 3.

16. Results Purpose Background Materials Projects Results Conclusion
References
Results

17. Purpose
Background
Materials
Projects
Results
Conclusion
References
When compared with a pre-calibrated magnetic field sensor, ours was found to be very accurate.

18. Purpose
Background
Materials
Projects
Results
Conclusion
References
Temperature sensors covered in thermally conductive epoxy reacts to changes faster than the clear epoxy. The fastest reaction time came with no epoxy at all

19. Purpose
Background
Materials
Projects
Results
Conclusion
References
Testing over several days has shown the program can run for an extended period.

20. Purpose
Background
Materials
Projects
Results
Conclusion
References
Preliminary oil spectrum data has suggested that in the oil exposed to our Teflon coated wire there is a small increase in absorbance around blue because of the printed letters on the insulation.

21. Non-Graphical Results
Fabricated prototype sensor mount and cover
Set up the ADC to send pulses to the S/R circuit
Began soldering components to the circuit board.

22. Purpose
Background
Materials
Projects
Results
Conclusion
References
Conclusion
When implemented, the final system of sensors will be able to monitor the magnetic field and temperature inside the detector, which will then be taken into consideration when calculating the results of Double Chooz. With information about the inside of the detector, it will be easier to eliminate many erroneous results, leading to measurements with greater precision.
This is just temp conclusion.

23. Acknowledgements The National Science Foundation - REU
Kansas State University – Physics Dept.
Dr. Glenn Horton-Smith
Dr. Larry Weaver
Dr. Kristan Corwin
Dante Amoroso – Technical Assistance
Dr. Sorenson, for the use of Dante
Scott Chainey – Technical Assistance
Russ Reynolds – Technical Assistance
and the rest of the Physics REU

24. References http://doublechooz.in2p3.fr/Public/public.php
Purpose
Background
Materials
Projects
Results
Conclusion
References
References