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DAEδALUS

The DAEδLUS Experiment


DAEδUS is a phased neutrino experiment whose ultimate goal is to search for evidence of CP violation in the neutrino sector through the oscillation of muon antineutrinos to electron antineutrinos over short baselines of up to 20km. The full experiment is still some way in the future, but the phased development provides opportunities for each stage to be used to explore other important areas for more physics results.

The structure of the full DAEδUS experiment will consist of several accelerator-based modules located at three distances (1.5km, 8km, and 20km) from a single detetor. Each of these stations will produce a flux of electron and muon neutrinos as well as muon antineutrinos from the decay-at-rest of positively charged pions and antimuons. Because the amount of electron antineutrinos in the initial neutrino flux is small, the measurement is very sensitive to the oscillation probability of muon antineutrnos to electron antineutrinos.

daedalus2cyclo

To this end, the near site will be used to constrain the initial neutirino flux and the mid site to contstrain the increase in the oscillaiton probabiluty as a function of distance. The far site will probe the maximum oscillation probability for these muon antineutrinos, which have energies of ~40MeV. Th detector, which will identify electron antineutrinos in the flux through the distinctive inverse beta decay signal, will be a Gadolinium-doped water Cherenkov detector or a liquid scintillator detector on the scale of many kilotons.

Each of the modules at the three stations will be made up of the following components: an H2+ ion source, a DAEδALUS injector cyclotron (DIC), a DAEδUS superconducting ring cyclotron (DSRC) and a target/dump. There is already a tremendous amount of work and research being done on each of these elements.

The H2+ ion source, which, due to the RF phase acceptance of the cyclotrons, will have to produce 30-40mA of beam in order to accelerate ust 5MA, is being perpared by colleagues at INFN Catania. This beam will be injected into the DIC, a cyclotron which will accelerate the H2+ to 60MeV/amu and then extract it using an electrostatic channel. This beam is then sent to the DSRC which will accelerate it still further, to energies of 800MeV, before using stripper foils to cleanly extract a beam of protons to be sent to the target/dump. Work on these designs is ongoing, and progressing well.

The use of cyclotrons allows for a more compact, and potentially lower cost, experiment. Furthermore, research and development to progress cyclotron technologies for the DAEδALUS experiment reflects a desire seen in, for example, the medical isotope industry. Consequently, work on the DAEδALUS experiment has immense value even outside neutrino physics. This is important in itself, but also for the willing industry collaboration it brings.

Finally, there are important decisions to be mae about exactly where we will run. There are many different detector options available to us, such as LENA or MEMPHYS or HYPER-K.

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Our Latest Work on DAEδALUS

  • All our IsoDAR work, which involves building the DIC for the first DAEδALUS module.
  • The Engineering Study of the DSRC magnet for the DAEδALUS experiment by PSFC at MIT is finished, and can be seen here.
  • Regular meetings with MIT, INFN, and BEST Cyclotrons to discuss planning and execution of a DIC central region test, which will be held at BEST, Inc. in Vancouver this summer.

Further Reading

  • High Current H2+ Cyclotrons for Neutrino Physics: the ISODAR and DAEδALUS Projects ArXiv.
  • Beam Dynamics Simulation for the High Intensity DAEδALUS Cyclotrons ArXiv.
  • Relevance of IsoDAR and DAEδALUS to medical Radioisotope Production ArXiv.
  • Multimegawatt DAEδALUS Cyclotrons for Neutrino Physics ArXiv.
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