Whitepaper on the DAEdALUS Program

Abstract

This whitepaper describes the status of the DAEδALUS program for development of high power cyclotrons as of the time of the final meeting of the Division of Particles and Fields 2013 Community Study ("Snowmass"). We report several new results, including a measurement capability between ∼4 and 12 degrees on the CP violating parameter in the neutrino sector. Past results, including the capability of the IsoDAR high ∆m 2 νe disappearance search, are reviewed. A discussion of the R&D successes, including construction of a beamline teststand, and future plans are provided. This text incorporates short whitepapers written for subgroups in the Intensity Frontier and Frontier Capabilities Working Groups that are available on the Snowmass website.

The leptonic CP phase from muon decay at rest with two detectors

“…The liquid scintillator detectors cannot determine the angle from which the neutrinos arrived and the beams are not pulsed, therefore only one cyclotron may run at a time. This is particularly problematic as these proposals are always statistics limited, even when the detector is as large as hyperK [8]. Thus our proposal, with a single µ + source, enjoys the same neutrino flux as would a proposal with three sources.…”

“…The manifestation of the DAEδALUS proposal in Ref. [3] and the variations which have since been proposed [7,8] each require three cyclotron pairs, each of which costs at least 25 to 100 million dollars [8]. Thus our proposal, with a single complex, represents a significant savings.…”

“…As explained in Ref. [8] a factor of 2 in the beam power at fixed perveance may be gained by accelerating H + 2 ions. This is challenging as the H + 2 excited states need to be controlled.…”

“…As can be seen, a single cyclotron complex, producing antineutrinos using µ + decay at rest, can determine δ with a precision of 20 (15) degrees in 6 (12) years using detectors that may anyway be built for reactor neutrino experiments. Backgrounds are expected to be small in this energy range and studies of such experiments [8] have consistently shown, albeit with 3 cyclotron complexes, that systematic errors are extremely small. Nonetheless in a subsequent publication we will examine the effects of these systematic errors and backgrounds as well as an optimization of the location of the cyclotron complex.…”

Order-of-Magnitude Beam Current Improvement in Compact Cyclotrons

“…Such a machine would have a transformative effect on multiple fields of fundamental and applied science, including neutrino physics, through the IsoDAR project [1][2][3]; isotope production for medicine and other uses [4][5][6]; materials testing for high radiation environments [7][8][9][10][11]; and as a pre-accelerator for a 10 mA, 800 MeV to 1 GeV cyclotron that can be used for Accelerator Driven Systems (ADS) [12][13][14][15] and particle physics (e.g. the DAEδALUS experiment [16][17][18][19][20]). We discuss these motivations below and summarize the applications in Table I.…”