No abstract available

[en] Sectioned Faraday cup is described accomodating 13 separate collectors assembled in one evacuated body. The instrument is intended for time measuring of current density distribution along the beam section. A measuring range of current density is 0.15-200 kA/sq.cm. Diameter of the beam measured is up to 6 cm. Results are presented of measuring current density in the beam of the 'Tonus' high-current accelerator

[en] A technique is described for direct and precise monitoring of the spatial dose uniformity of an electrically scanned ion beam. The method employs a two-dimensional 10 x 10 array of Faraday cups, individually connected to a current integrator, to measure local dose distribution. It also employs a microprocessor for rapid data processing and topographic data display. The technique is applicable to high quality ion implantation processes as a uniformity monitor with an accuracy of 1%. In addition, a new concept for uniform ion beam scanning is proposed

[en] The use of a cage of metallic wires as a bead is proposed to measure the higher order modes (HOMs) in an X-band accelerating structure. These long thin wires can isolate the longitudinal electric field component from other field components and produce sufficient frequency shift in bead-pull measurements. In the setup described in this paper, the bead is made by sputtering silver film onto a thin nylon line through a specially designed fixture. The cage has a size of approximately 0.5 mm in diameter, 2 mm in length and more than six metallic wires of less than 0.1 mm in width. The fabrication and calibration of the cage are described. The longitudinal electric fields of the lowest passband dipole mode TM₁₁₀ in a 30 cm long X-band structure are measured by bead-pull measurements. Results are compared with the calculated ones obtained from URMELT-code

[en] This paper presents design and evaluation of a simple tool for assessing of electric charge levels on powders. The testing device uses a stackable Faraday cup arrangement for measurement of charges on size fractions of the powder under investigation. The powder is pneumatically transported through the Faraday cups column. The cups utilize specially designed sieves for separation of the powder particles by size. Additionally, the sieving membrane in the topmost cup is acoustically vibrated to help with the powder separation process

[en] The new fast wire scanner foreseen to measure small emittance beams throughout the LHC injector chain will have a wire travelling at a speed of up to 20 m.s^-1, with a requested wire position measurement accuracy in the order of a few microns. The vibration of the thin carbon wires used has been identified as one of the major error sources on the wire position accuracy. One of the most challenging and innovative developments in this project has been the work to quantify the effect of wire vibrations and fork deformation. The measurement strategy for the former is based on the piezo resistive effect of the wire itself, while the deflection of the fork supporting the wire has been measured by semiconductor strain gauges. Dynamic models of the wire and fork have been created to predict the behaviour of the fork-wire assembly and will be used for its optimisation. This contribution will discuss the measurement setup and the model development as well as their comparison. In addition it will show that this technology can easily be implemented in current operating devices without major modifications. (author)

No abstract available

[en] The paper reports on: 1) The development of a duoplasmatron ion source for the production of multiply charged silver ions; 2) the development of a B(max) anode duoplasmatron ion source with direct cooling; 3) first measurements with a duopigatron ion source, and 4) the constructional layout of Faraday cups. (WL/AK)

[en] Deviation of the Fast Faraday Cup signal from the longitudinal shape of the measured bunch is estimated, and a simple formula for the increase of the signal rms width is suggested.

[en] The emerging technology during the last years allowed the development of new sensors equipped with wireless communication which can be organized into a cooperative autonomous network. Some application areas for wireless sensor networks (WSNs) are home automations, health care services, military domain, and environment monitoring. The required constraints are limited capacity of processing, limited storage capability, and especially these nodes are limited in energy. In addition, such networks are tiny battery powered which their lifetime is very limited. During image processing and transmission to the destination, the lifetime of sensor network is decreased quickly due to battery and processing power constraints. Therefore, digital image transmissions are a significant challenge for image sensor based Wireless Sensor Networks (WSNs). Based on a wavelet image compression, we propose a novel, robust and energy-efficient scheme, called Priority Image Transmission (PIT) in WSN by providing various priority levels during image transmissions. Different priorities in the compressed image are considered. The information for the significant wavelet coeffcients are transmitted with higher quality assurance, whereas relatively less important coefficients are transmitted with lower overhead. Simulation results show that the proposed scheme prolongs the system lifetime and achieves higher energy efficiency in WSN with an acceptable compromise on the image quality.