Overview%20of%20the%20Present%20and%20the%20Future%20Status%20of%20the%20LLRF%20at%20SMTF%20

1
Overview of the Present and the Future Status of
the LLRF at SMTF A0

• Prepared by
• Alexander Brandt Timothy Koeth

AB Alexander Brandt RC Ruben Carcagno TK
Tim Koeth SS Stefan Simrock RR Ron
Rechenmacher WK Waldermar Koprek
KR Kay Rhelich BC Brian Chase TC Thomasz
Czarski
2
Worth mentioning A0 DOOCS Upgrade

• TK, RR, KR will hopefully complete upgrade in
  May/June 05
• Upgrade Requires
• Wooster root access for KR, RR, (TK?)
• New Sun Sparc CPU
• New ADC board (for monitoring)

3
LLRF Goals

• I. DESY Remotely control of SimCon 2.1 Cavity
  Simulator _at_ FNAL
• II. Again install SimCon 2.1 at A0 for local
  control of 9-cell Cap-Cav 1.
• III. DESY Remote Control of 9-cell _at_ A0
• IV. Provide 2nd system for Cap-Cav 2 test at
  SMTF SimCon 3.1 (?)
• V. Provide 3rd system for 3.9 GHz using SimCon
  3.1 (?)

4
I.DESY Remote Control of SimCon2.1 Cav. Simulator

• Information Updating too quickly to write about
• Lets hear the latest from
• Waldemar, et. al _at_ DESY
• Ron Ruben _at_ FNAL

5
II.Reestablish Local Control of CC1 with SimCon2.1

• Requires
• Development crate to be moved and Installed A0
  (RC, RR)
• B.Chases VectMod needs to be resurrected (BC)
• Alexander (?) to set up SimCon2.1 identical to
  recent March test and debug (AB, RC, RR, TK, BC,
  etc) Windows or Solaris Control ? Solaris is
  prefd
• Scheduling with A0 upgrades (need south cave
  closed) (A0 DESY Folks)
• This should occur approx early to middle May !
• (or sooner if TK can play the role of AB)

6
What's Presently At A0

• Old TTF System based on C-40 DSP
• 1.3GHz250kHz sinusoidal LO
• 10MHz timing

VM
VM
1.3GHz
SPARC SV
Timing
ADCs (Control)
DSP C-40
DAC
ADCs (Monitoring)
Function Generator
1.30025GHz
1.3
10MHz
Wooster Crate
Linux
7
II. Duplicate SimCon Test Setup March '05

• FPGA-system based on Xilinx Virtex 2000
• On-board 2 ADCs, 2 DACs
• Square-like LO-generation uses Woosters FG and a
  loose VM
• Only a few changes made wrt. original setup
  (removed attenuation at VM output, exchanged
  drive signal cabling)

1.30025GHz (square-like)
VM
VM
VM
1.3GHz
SPARC SV
Timing
ADCs (Control)
DSP C-40
DAC
ADCs (Monitoring)
Function Generator
SPARC
LPT2VME
SimCon 2.1
1.30025GHz
1.3
10MHz
Wooster Crate
WindowMatlab
Linux
8
Screen-Shot from March '05
9
III. DESY remote control of CC1 with SimCon2.1

• Requires
• Solaris Machine properly networked (RR)
• Create needed accounts (RR)
• MatLab installed (RR)
• All VME drivers installed (RR, AB, WK)
• Simple switch over from A0 Ops to Remote DESY RD
• Q Control with MatLab or DOOCS interface?
• Should be able to accomplish during ABs visit to
  FNAL early to mid-May as to assist DESY.
• gtgtgtgt BEFORE May 23rd ! ltltltlt

10
III. DESY remote control of CC1 with SimCon2.1

• After remote control is established (TC, WK, AB)
• 1st Need Calibrations (help from persons at FNAL,
  TK AB etc)
• Offset compensation of vector modulator
• Loop Gain, Loop Phase
• Initial calibration of ADC channels of down
  converted signal
• Port our DOOCS readout of the gradient directly
  to Solaris?
• We need two values from DOOCS per pulse
• Maximum power from klystron
• Maximum gradient during pulse.
• TEST 1 feed forward driving at different
  gradient
• TEST 2 feed back feed forward
• Other tests before May 23rd ?

11
IV. SimCon3.1 for Cap-Cav 2 SMTF test (Oct 05)

• SMTF TEST (located at Meson Hall)
• 4.5K operation (possibly 2K)
• No Beam
• Requires
• at least 2nd SimCon2.1 (or SimCom3.1 and some
  shuffling) in September
• New Master Oscillator (FNAL)
• New Timing 10(?)MHz timing module (FNAL)
• Double balanced mixer (F) or analog multiplier
  (D) for down conversion ? To be determined

12
New Master Oscillator Scheme
(Minimum of ports)
3900MHz (Fundamental Ref) x2
2600MHz (opt. Fundamental Ref) x2
1352MHz (LO) x5
3.9GHz
1300MHz (Gun, CC1, CC2,3.9tricks) x5?
81MHz (DAC clock, LASER ?) x6
65MHz (IF) x5?
52MHz (ADC clock new) x5
10MHz (timing old) x?
9MHz (timing new) x5
1MHz (DAC clock) x5

• Have a high frequency, low noise reference at
  3.9GHz (or 2.6GHz)
• Derive other frequencies using low noise dividers

13
V. Proposal for Control of 3.9GHz Cavity
This box looks like a 1.3GHz-system!
x 2
2.6GHz
VM

1.3GHz
3.9GHz
1.3GHz
1.3GHz
1.3GHz
FPGA
14
Schedule for SMTF
1.3GHz
1.3GHz
1.3GHz
3.9GHz
Current setup at A0
Planed for Meson Area October 05
Joined in early '06
15
Task List Summary

• - Upgrade A0 DOOCS
• - Proposed 2 modes of LLRF operation at A0
• 1.Local (normal) control, but with upgrade
• 2.Remote control of CC1 with Dev5 crate
• (minimal cable switching)
• DESY to provide SimCon 3.1 for Oct SMTF test
• FNAL to provide MO 10(?)MHz timing module
• DESY to provide modified LLRF SimCon3.1 for 3.9
  GHz operations,
• DESY to provide analog multiplier

16
Road Map Overview
Time
Remote Control of CC1 w/ SimCon2.1 (May 05) AB
WK et. al
Upgrade DOOCS for A0 operations (May 05)
FNAL new MO 10MHz Timing card DESY SimCon 3.1
Analog Multiplier
SimCon3.1 control of CC2 At SMTF - NO BEAM (Sept
05)
(Move CC2 to A0)

• A0 40 MeV Upgrade(Jan 06)
• 4 Klystrons (4 LLRF cntrl systems)
• Gun, CC1, CC2, 3.9GHz

3.9 GHz Cavity Control