Paper:	Progress Report on the Japanese ALMA Project
Volume:	344, The Cool Universe: Observing Cosmic Dawn
Page:	237
Authors:	Kawabe, R.
Abstract:	We report here on the progress of the Japanese ALMA project (ALMA-J). The Japanese ALMA project culminates 20 years of development. There are two main Japanese contributions to the ALMA project, commonly called “enhancements”. One is the design and construction of the Atacama Compact Array (ACA). ACA is composed of a total power array with four 12m antennas and a 7m array with twelve 7m antennas. The main role of ACA is to guarantee high fidelity imaging by combining total power data and short baseline data with data that are taken with the larger 64 antenna array. The other enhancement is the production of 80 receiver cartridges for each of three bands, bands 4, 8, and 10, to be installed into both the 64 antenna array and the 16 ACA antennas. The construction budget for these enhancements has been funded since April 2004.

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