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The AMoRE (Advanced Mo-based Rare process Experiment) project is a series ofexperiments that use advanced cryogenic techniques to search for theneutrinoless double-beta decay of \mohundred. The work is being carried out byan international collaboration of researchers from eight countries. Thesesearches involve high precision measurements of radiation-induced temperaturechanges and scintillation light produced in ultra-pure \Mo[100]-enriched and\Ca[48]-depleted calcium molybdate ($\mathrm{^{48depl}Ca^{100}MoO_4}$) crystalsthat are located in a deep underground laboratory in Korea. The \mohundrednuclide was chosen for this \zeronubb decay search because of its high$Q$-value and favorable nuclear matrix element. Tests have demonstrated that\camo crystals produce the brightest scintillation light among all of themolybdate crystals, both at room and at cryogenic temperatures.$\mathrm{^{48depl}Ca^{100}MoO_4}$ crystals are being operated at milli-Kelvintemperatures and read out via specially developed metallic-magnetic-calorimeter(MMC) temperature sensors that have excellent energy resolution and relativelyfast response times. The excellent energy resolution provides gooddiscrimination of signal from backgrounds, and the fast response time isimportant for minimizing the irreducible background caused by randomcoincidence of two-neutrino double-beta decay events of \mohundred nuclei.Comparisons of the scintillating-light and phonon yields and pulse shapediscrimination of the phonon signals will be used to provide redundantrejection of alpha-ray-induced backgrounds. An effective Majorana neutrino masssensitivity that reaches the expected range of the inverted neutrino masshierarchy, i.e., 20-50 meV, could be achieved with a 200~kg array of$\mathrm{^{48depl}Ca^{100}MoO_4}$ crystals operating for three years.

Technical Design Report for the AMoRE $0\nu\beta\beta$ Decay Search Experiment