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Title: A 96 channel receiver for the ILCTA LLRF system at Fermilab

Abstract

The present configuration of an ILC main LINAC RF station has 26 nine cell cavities driven from one klystron. With the addition of waveguide power coupler monitors, 96 RF signals will be down-converted and processed. A down-converter chassis is being developed that contains 12 eight channel analog modules and a single upconverter module. This chassis will first be deployed for testing a cryomodule composed of eight cavities located at New Muon Laboratory (NML) - Fermilab. Critical parts of the design for LLRF applications are identified and a detailed description of the circuit with various characteristic measurements is presented. The board is composed of an input band-pass filter centered at 1.3GHz, followed by a mixer, which down-converts the cavity probe signal to a proposed 13 MHz intermediate frequency. Cables with 8 channels per connector and good isolation between channels are being used to interconnect each down-converter module with a digital board. As mixers, amplifiers and power splitters are the most sensitive parts for noise, nonlinearities and crosstalk issues, special attention is given to these parts in the design of the LO port multiplication and distribution.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
917860
Report Number(s):
FERMILAB-CONF-07-299-AD
TRN: US0805163
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; AMPLIFIERS; CABLES; CAVITIES; CONFIGURATION; CONNECTORS; DESIGN; DISTRIBUTION; FERMILAB; LINEAR ACCELERATORS; MIXERS; MONITORS; MUONS; PROBES; TESTING; WAVEGUIDES; Accelerators

Citation Formats

Mavric, Uros, Chase, Brian, Branlard, Julien, Cullerton, Ed, Klepec, Dan, and /Fermilab. A 96 channel receiver for the ILCTA LLRF system at Fermilab. United States: N. p., 2007. Web.
Mavric, Uros, Chase, Brian, Branlard, Julien, Cullerton, Ed, Klepec, Dan, & /Fermilab. A 96 channel receiver for the ILCTA LLRF system at Fermilab. United States.
Mavric, Uros, Chase, Brian, Branlard, Julien, Cullerton, Ed, Klepec, Dan, and /Fermilab. 2007. "A 96 channel receiver for the ILCTA LLRF system at Fermilab". United States. https://www.osti.gov/servlets/purl/917860.
@article{osti_917860,
title = {A 96 channel receiver for the ILCTA LLRF system at Fermilab},
author = {Mavric, Uros and Chase, Brian and Branlard, Julien and Cullerton, Ed and Klepec, Dan and /Fermilab},
abstractNote = {The present configuration of an ILC main LINAC RF station has 26 nine cell cavities driven from one klystron. With the addition of waveguide power coupler monitors, 96 RF signals will be down-converted and processed. A down-converter chassis is being developed that contains 12 eight channel analog modules and a single upconverter module. This chassis will first be deployed for testing a cryomodule composed of eight cavities located at New Muon Laboratory (NML) - Fermilab. Critical parts of the design for LLRF applications are identified and a detailed description of the circuit with various characteristic measurements is presented. The board is composed of an input band-pass filter centered at 1.3GHz, followed by a mixer, which down-converts the cavity probe signal to a proposed 13 MHz intermediate frequency. Cables with 8 channels per connector and good isolation between channels are being used to interconnect each down-converter module with a digital board. As mixers, amplifiers and power splitters are the most sensitive parts for noise, nonlinearities and crosstalk issues, special attention is given to these parts in the design of the LO port multiplication and distribution.},
doi = {},
url = {https://www.osti.gov/biblio/917860}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2007},
month = {Fri Jun 01 00:00:00 EDT 2007}
}

Conference:
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