Abstract: When adjusting optical axes of a multi-beam charged particle beam device, because parameters of optical systems are inter-dependent, the time required to adjust the parameters increases. Thus, the present invention provides a charged particle beam device provided with an optical parameter setting unit for setting parameters of optical systems for emitting a plurality of primary charged particle beams to a sample, detectors for individually detecting a plurality of secondary charged particle beams discharged from the sample, a plurality of memories for storing signals detected by the detectors and converted into digital pixels in the form of images, evaluation value derivation units for deriving evaluation values of the primary charged particle beams from the images, and a GUI capable of displaying the images and receiving an input from a user, wherein the GUI displays the images and evaluation results based on the evaluation values and changes various optical parameters in real-time.

Abstract: An accelerator device including a cache memory, a controller that is electrically coupled to the cache memory, a host computer connecter that is electrically coupled to the controller, and a removable storage device connector that is electrically coupled to the controller. The accelerator device can be electrically coupled to a host computer via the host computer connector. The accelerator device can also be electrically coupled to a removable storage device via the removable storage device connector. When the accelerator device is electrically coupled to the host computer and the removable storage device is electrically coupled to the accelerator device, the controller caches data sent from the host computer to the removable storage device in the cache memory prior to the data being sent from the accelerator device to the removable storage device.

Abstract: A multiple-input logic circuit for carrying out an even parity check operation or an odd parity check operation on a plurality of input signals has such a circuit construction that a signal only passes through a maximum of essentially two gates between an input and an output of the multiple-input logic circuit, so as to increase the operation speed and reduce the number of elements constituting the multiple-input logic circuit.

Abstract: A recovery type flux feeding assembly is disclosed. The assembly includes a virgin flux hopper and a waste flux hopper with a flux feed conduit connected to the bottom of the waste flux hopper. The hoppers are separated by a drop stop which selectively permits flux from the virgin flux hopper to enter the waste flux hopper so that the flux exiting through the flux feed is a mixture of the two. A flux return assembly consists of a flux recovery port positioned adjacent the waste flux from the weld, a cyclone attached to the top of the waste flux hopper and a conduit connecting the two. An air injector injects air into a midpoint of the conduit between the flux recovery port and the cyclone so that the cyclone is kept at a positive pressure and the waste flux therein is not sucked out. Conduits are included between the tops of the hoppers for equalizing the pressures therebetween.