Abstract: The present invention concerns a charged-particle multi-beamlet system that comprises a source of charged particles (301); a first multi-aperture plate (320) having plural apertures disposed in a charged particle beam path of the system downstream of the source; a first multi-aperture selector plate (313) having plural apertures; a carrier (340), wherein the first multi-aperture selector plate is mounted on the carrier; and an actuator (350) configured to move the carrier such that the first multi-aperture selector plate is disposed in the charged particle beam path of the system downstream of the source in a first mode of operation of the system, and such that the first multi-aperture selector plate is disposed outside of the charged particle beam path in a second mode of operation of the system.

Abstract: A particle optical system comprises a beam generating system (3) configured to generate a plurality of particle beams (5) and to direct the plurality of particle beams (5) onto an object plane (7), a first deflector arrangement (35) arranged in the beam path of the particle beams (5) upstream of the object plane (7) and configured to deflect the plurality of particle beams (5) before they are incident on the object plane (7), an object holder (15) configured to hold an object (17) to be inspected in the object plane (7), a plurality of detectors (27) configured to receive and to detect the plurality of particle beams (5) having traversed the object plane (7), wherein the detectors are arranged in a detection plane (21) on a side of the object plane (7) opposite to the beam generating system (3), at least one first particle optical lens (19) configured to collect particles of the particle beams emanating from the object plane on the detectors (27), and a controller (31) configured to control the first deflecto

Abstract: A particle optical system comprises a beam generating system (3) configured to generate a plurality of particle beams (5) and to direct the plurality of particle beams (5) onto an object plane (7), a first deflector arrangement (35) arranged in the beam path of the particle beams (5) upstream of the object plane (7) and configured to deflect the plurality of particle beams (5) before they are incident on the object plane (7), an object holder (15) configured to hold an object (17) to be inspected in the object plane (7), a plurality of detectors (27) configured to receive and to detect the plurality of particle beams (5) having traversed the object plane (7), wherein the detectors are arranged in a detection plane (21) on a side of the object plane (7) opposite to the beam generating system (3), at least one first particle optical lens (19) configured to collect particles of the particle beams emanating from the object plane on the detectors (27), and a controller (31) configured to control the first deflecto

Abstract: The present invention concerns a charged-particle multi-beamlet system that comprises a source of charged particles (301); a first multi-aperture plate (320) having plural apertures disposed in a charged particle beam path of the system down-stream of the source; a first multi-aperture selector plate (313) having plural apertures; a carrier (340), wherein the first multi-aperture selector plate is mounted on the carrier; and an actuator (350) configured to move the carrier such that the first multi-aperture selector plate is disposed in the charged particle beam path of the system downstream of the source in a first mode of operation of the system, and such that the first multi-aperture selector plate is disposed outside of the charged particle beam path in a second mode of operation of the system.

Abstract: Purified form of streptogramines, characterised in that it contains at least one component from group B streptogramines of general formula (I), wherein R1 is Me or Et, R2 is H or OH, and R3 is substituted benzyl of general formula (III), such that 1) if R2 is H, R is NR4R5, wherein one of R4 and R5 is H or an Me radical and the other is Me, and R′ is Cl or Br, or R is (C3-5)alkenyl if R4 and R5 are Me, or 2) R is H and R′ is halogen, alkylamino or dialkylamino, an ether-oxide residue, alkylthio, (C1-3)alkyl or trihalogenomethyl, or R is halogen, (C2-4)alkylamino, (C2-4)dialkylamino or methyl ethyl amino, pyrrolidino alkenyl alkyl amino, dialkylamino, an alkyl cycloalkylmethyl amino radical or in ether-oxide residue, alkylthio, alkylthiomethyl, (C1-6)alkyl, aryl or trihalogenomethyl, and R′ is H, or R is halogen, amino, alkylamino or dialkylamino, an ether-oxide residue, an alkylthio radical, (C1-6)alkyl or trihalogenomethyl and R′ is halogen, alkylamino or dialkylamino, an ether-oxide

Abstract: This invention relates to a purified form of streptogramins, having of a combination of one or more group B components of streptogramins, of general formula: ##STR1## in which A.sub.1 is a radical of general formula: ##STR2## for which R' is H or OH and Y is H, a methylamino radical or a dimethylamino radical,R is an ethyl radical or, when R' is H, R can also represent--CH.sub.3, andR.sub.1 and R.sub.2 are H, or alternativelyA.sub.1 is a radical of formula: ##STR3## R is an isobutyl radical, and R.sub.1 is OH and R.sub.2 is --CH.sub.3,and one or more group A minority components of streptogramins, of general formula: ##STR4## in which R" is H or a methyl or ethyl radical, in the state of cocrystallizate, of a coprecipitate or of a physical mixture of the powders.

Abstract: This invention relates to a purified form of streptogramins, consisting of a combination of one or more group B components of streptogramins, of general formula: ##STR1## in which A.sub.1 is a radical of general formula: ##STR2## for which R' is H or OH and Y is H, a methylamino radical or a dimethylamino radical, R is an ethyl radical or, when R' is H, R can also represent --CH.sub.3, and R.sub.1 and R.sub.2 are H, or alternatively A.sub.1 is a radical of formula: ##STR3## R is an isobutyl radical, and R.sub.1 is OH and R.sub.2 is --CH.sub.3, and one or more group A minority components of streptogramins, of general formula: ##STR4## in which R" is H or a methyl or ethyl radical, in the state of cocrystallizate, of a coprecipitate or of a physical mixture of the powders.