Linac 4 Instrumentation Day Faraday Cups n In
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Linac 4 Instrumentation Day Faraday Cups n In order to measure the beam intensity three Faraday Cups will be installed in different places n LEBT n n Spectrometer n n Low energy Moving Diagnostics Bench for the three DTL tanks n 09 -05 -2007 Low energy High energy C. Bal AB/BI/ML 1
Faraday Cups Scheme of Linac 4 09 -05 -2007 C. Bal AB/BI/ML 2
Faraday Cups Specifications LEBT n Low Energy: 95 ke. V n Commissioning & Operation n Retractable n Acceptance FC ø 80 mm n Acceptance Tank ø 100 mm 09 -05 -2007 Parameter Ion Species Pulse Length Rep. Rate Beam Power Pressure Source Current Bias Voltage C. Bal AB/BI/ML Quantity H 400 µs 2 Hz 6 W 10 -5 mbar 80 m. A 3 k. V 3
Faraday Cups Mechanical Design LEBT 09 -05 -2007 C. Bal AB/BI/ML 4
Faraday Cups Mechanical Design LEBT n n n n n Bias Ring, Collector and Housing made of St. Steel Vespel Insulators for electrical isolation Conical Collector Use of metal seals only Flanged High Voltage Feedthrough Flanged Signal Feedthrough Linear Pneumatic Drive (travel 102 mm) Flange DN 150 CF (øouter 202 mm) Parts slide into Housing and will be closed by dismountable Face and Back Plate 09 -05 -2007 C. Bal AB/BI/ML 5
Faraday Cups Specifications Spectrometer n Low Energy: 95 ke. V n Temporary installation n Commissioning only n Fixed n Similar design as for LEBT 09 -05 -2007 C. Bal AB/BI/ML 6
Faraday Cups Specifications Moving Bench DTL n High Energy: 40 Me. V n n Ø Parameter Commissioning only Ion Species Retractable Pulse Length Requires Cooling Rep. Rate Requires Energy Beam Power Absorber (levels to be Pressure defined) Linac Current Design under Bias Voltage development 09 -05 -2007 C. Bal AB/BI/ML Quantity H 400 µs 2 Hz 5. 1 k. W 10 -7 mbar 40 m. A 3 k. V 7
Faraday Cups Electronics n Local read-out by means of a scope n Remote controlled at a later stadium 09 -05 -2007 C. Bal AB/BI/ML 8
