A series of beam experiments is being planned in the Jefferson Lab FEL driver accelerator in order to study multi-pass beam breakup instabilities in the machine and to test the predictions of the numerical code TDBBU. The tests are extensions of previously performed or proposed experiments, and will be considerably more sensitive with the present configuration. The experiments will include: a) ...

The Spallation Neutron Source (SNS) will be constructed by a multi-laboratory collaboration with BNL responsible for the transfer lines and ring. [1] The 1 MW beam power necessitates careful monitoring to minimize un-controlled loss. This high beam power will influence the design of the monitors in the high energy beam transport line (HEBT) from linac to ring, in the ring, and in the ring-totar...

Abstract The requests of broadband coverage area and the expected user demand is satisfied by satellite industry using multiple spot beams high throughput satellites with fixed multi-beam pattern footprint planning. technology core high-throughput technology, means to efficiently reuse spectrum a full-frequency scheme. In order study channel capacity limit systems, Wiener-Gaussian access model ...

Intelligent reflecting surface (IRS) has been deemed as a transformative technology to achieve smart and reconfigurable environment for wireless communication. This letter studies new IRS-aided communication system, where multiple IRSs assist in the between multi-antenna base station (BS) remote single-antenna user by multi-hop signal reflection. Specifically, exploiting line-of-sight (LoS) lin...

This work presents an audio beam loudspeaker that possesses the capability of emitting multiple audio beams into different directions at the same time. Ultrasonic loudspeakers applying parametric array technology are used to generate highly directional audible sound beams. The loudspeaker itself appears as a single device and can be mounted under the ceiling of a room in order to supply selecte...