30 research outputs found
Solid State Technology Branch of NASA Lewis Research Center
A collection of papers written by the members of the Solid State Technology Branch of NASA LeRC from Jun. 1991 - Jun. 1992 is presented. A range of topics relating to superconductivity, Monolithic Microwave Circuits (MMIC's), coplanar waveguides, and material characterization is covered
NASA compendium of satellite communications programs
A comprehensive review of worldwide satellite communication programs is reported that ranges in time from the inception of satellite communications to mid-1971. Particular emphasis is placed on program results, including experiments conducted, communications system operational performance, and technology employed
NASA compendium of satellite communications programs
A comprehensive review is given of worldwide satellite communication programs that range in time from the inception of satellite communications to mid-1974. Particular emphasis is placed on program results, including experiments conducted, communications system operational performance, and technology employed. The background for understanding these results is established through brief summaries of the program organization, system configuration, and satellite and ground terminal characteristics. Major consideration is given to the communications system aspects of each program, but general spacecraft technology and other experiments conducted as part of the same program are mentioned summarily
NASA Compendium of Satellite Communications Programs
A comprehensive review is presented of worldwide communication programs that range in time from the inception of satellite communications to August 1971. The programs included are: Echo, Courier, West Ford, Telstar, Relay, Syncom, Lincoln experimental satellites, Intelsat, Tacsat, Skynet, Nato system, and Telesat
Technology forecasting for space communication
A study was conducted to determine techniques for application to space communication. The subjects considered are as follows: (1) optical communication systems, (2) laser communications for data acquisition networks, (3) spacecraft data rate requirements, (4) telemetry, command, and data handling, (5) spacecraft tracking and data network antenna and preamplifier cost tradeoff study, and (6) spacecraft communication terminal evaluation
Super-High-Frequency /SHF/ communications system performance on ATS. Volume 1 - System summary
Super high frequency communication systems performance on ATS - Vol.
CEPC Technical Design Report -- Accelerator (v2)
The Circular Electron Positron Collider (CEPC) is a large scientific project
initiated and hosted by China, fostered through extensive collaboration with
international partners. The complex comprises four accelerators: a 30 GeV
Linac, a 1.1 GeV Damping Ring, a Booster capable of achieving energies up to
180 GeV, and a Collider operating at varying energy modes (Z, W, H, and ttbar).
The Linac and Damping Ring are situated on the surface, while the Booster and
Collider are housed in a 100 km circumference underground tunnel, strategically
accommodating future expansion with provisions for a Super Proton Proton
Collider (SPPC). The CEPC primarily serves as a Higgs factory. In its baseline
design with synchrotron radiation (SR) power of 30 MW per beam, it can achieve
a luminosity of 5e34 /cm^2/s^1, resulting in an integrated luminosity of 13 /ab
for two interaction points over a decade, producing 2.6 million Higgs bosons.
Increasing the SR power to 50 MW per beam expands the CEPC's capability to
generate 4.3 million Higgs bosons, facilitating precise measurements of Higgs
coupling at sub-percent levels, exceeding the precision expected from the
HL-LHC by an order of magnitude. This Technical Design Report (TDR) follows the
Preliminary Conceptual Design Report (Pre-CDR, 2015) and the Conceptual Design
Report (CDR, 2018), comprehensively detailing the machine's layout and
performance, physical design and analysis, technical systems design, R&D and
prototyping efforts, and associated civil engineering aspects. Additionally, it
includes a cost estimate and a preliminary construction timeline, establishing
a framework for forthcoming engineering design phase and site selection
procedures. Construction is anticipated to begin around 2027-2028, pending
government approval, with an estimated duration of 8 years. The commencement of
experiments could potentially initiate in the mid-2030s.Comment: 1106 page