New Coil Drivers Time LineNew Coil Drivers Time Line
Alberto Gennai
I.N.F.N. Pisa
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
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Documentation KitDocumentation Kit
Final Design Description
–VIR-SPE-PIS-4900-121, New Coil Drivers Final Design
Schedule and Budget
–VIR-SPE-PIS-4900-129, New Coil Drivers 2006 Budget
Presentations to the Virgo Collaboration
•Detector Meeting 22/01/2004
•Detector Meeting 08/06/2004
•Detector Meeting 28/07/2004
•Virgo R&D 30/09/2004
•Detector Meeting 01/11/2004
•Coil Drivers Meeting 10/01/2005
•Electronic R&D Meeting 9/02/2006
Conferences
–IEEE Workshop 21/11/2004
–Amaldi 6 Poster Session
–Australia-Italy Workshop, 5/10/2005
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
3
Overview and MotivationsOverview and Motivations
Coil-magnet pair actuators steering VIRGOoptical elements need a dynamical range widerthan what initially foreseen due to the big forceimpulse required for acquiring the lock ofVIRGO optical cavities.
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
4
Actuator noise: current status
Overview and Motivations (cont.)Overview and Motivations (cont.)
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
5
Extending DynamicsExtending Dynamics
Solution
–Use of 2 DAC channels
•DAC #1 for lock acquisition when the large forceimpulse is required (up to 2A output current)
•DAC #2 for linear regime when low noise is required(programmable max output current)
Prototype currently in use
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
6
Requirements SpecificationRequirements Specification
de-emphasis filter with p = 2 rad/sec and z = 60 rad/sec
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
7
Prototypes StatusPrototypes Status
Emphasys filter
No smoothtransition
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
8
Potential RiskPotential Risk
Since ITF re-start problems weredetected switching coil driver prototypes(lock lost when disconnectingHighPower section)
Investigations are in progress to checkprototypes behavior (V. Dattilo, M.Barsuglia).
Report expected to be ready soon
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
9
Final Design – Standard CourseFinal Design – Standard Course
Standard operation “2 steps” sequence will be the following
1.High Power and Low Noise #2 sections are both connected to coil. Low Noise #1section is disconnected. Use Analog IN #1 and High Power section to acquire lockwith Analog IN #2 set to zero.
2.Set Analog IN #1 to zero and Analog IN #2 to required correction signal.
3.Disconnect High Power section.
4.Connect Low Noise #1.
5.Set Analog IN #2 to zero and Analog IN #1 to required correction signal.
6.Disconnect Low Noise #2.
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
10
Final Design –Improved EMI/EMCFinal Design –Improved EMI/EMC
To improve EMI/EMC, digital to analog and analog to digitalconverters, currently installed in VIRGO Data Acquisitionroom and connected to coil drivers with about 30 meters ofSTP cable, can be installed on-board
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
11
Final Design – Product BreakdownFinal Design – Product Breakdown
Each Coil Driver module is composed by two distinct sections:
–ACDV. Analog part implementing the High Power section, the two Low Noise sections andthe two monitoring sections.
–DCDV. Digital part implementing the control interface of the CDV04 module for sectionsswitch, gain selection and configuration. Development of this part (R&D Virgo ControlSystem Upgrade) is in progress. Installation in Virgo foreseen to take place in 2008.
CDV04
ACDV
HighPower
LowNoise#1
LowNoise#2
DCDV
RelaysControl
ADC-DAC
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
12
ACDV Schedule: Main MilestonesACDV Schedule: Main Milestones
M1: July 14 (TBC)
–Commissioning-Operation report ready
–CRE approved (change was already approved inJanuary 2005 in a dedicated meeting)
M2: September 15th (M1 + 40 wrk days)
–4 new prototypes (12 coils) ready to be installed fortest (NE and/or WE?)
M3: November (M2 + 50 wrk days)
–Full production ready to be installed
M4: 2007 (TBC)
–Upper stage coil drivers production
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
13
Detector Meeting,5/7/2006
A.Gennai, INFN Pisa
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ResourcesResources
Roberto CavalieriE.G.O.
Alberto GennaiI.N.F.N. Pisa
Carlo MagazzùI.N.F.N. Pisa
Federico PaolettiE.G.O.
Diego PassuelloI.N.F.N. Pisa
Ciro TremolaI.N.F.N. & University of Pisa