adt re-commissioning after ls1 a. butterworth, w. höfle, f. killing, g. kotzian, t. levens, d....

ADT re-commissioning after LS1 1

ADT re-commissioning after LS1

A. Butterworth, W. Höfle, F. Killing, G. Kotzian, T. Levens, D. Valuch

with many thanks to BE/OP

LBOC, 15.7.2014


Motivation

• Requirements for commissioning time with beam and for the ramp-up in intensity (including scrubbing) (assume the requirements for the preparation without beam will be dealt by the cold check-out team)

• A list of the modifications/improvements occurred during LS1 if not presented yet and a break-down of the activities and preparation required for:• operation with pilot bunches,• operation with a single nominal bunch,• operation with trains (low number),• operation with trains (large number).

• The goal of each step should be identified and the minimum beam characteristics and time requirements should be indicated.

LBOC, 15.7.2014


ADT after LS1 (low level RF system)

• ADT undergoes a major upgrade during the LS1• 2x number of pickups• New Beam Position hardware/firmware/FESA/software• New Digital Signal Processing hardware/firmware/FESA/software

• Many new properties/functionalities

• New FGCs (2x number of functions)• New cabling (different delays and transfer functions)

• Number of significant changes is large we consider it to be a new system

• Procedures well established, all experience from Run I. • …and number of experts increased by 3.5dB for Run II!

LBOC, 15.7.2014


ADT after LS1 (power system)

Power amplifiers• Maintenance (cleaning, divider calibration,

re-commissioning in B.867)• New relay plates• New air cooling system• New air cooling pipes• New 200W loads• Removal of pre-heating resistances• New water flow meters in RB44 – RB46• New clamp between amplifiers and kickers• New clamp between kickers striplines and

feedthroughs• Additional vacuum gauge in RB44 (3

gauges per beams and on each sides, 12 in all)

Anode Power converters• Cleaning• Exchange all fans• Adding new H.V. switches (command

off/online remotely)

LBOC, 15.7.2014


Cold check-out activities (phase 1)

• Check all pickup cables are correctly connected in the tunnel• Pickup swap with BI• HOM port VNA measurements for all kickers

• Once water and HV is available at P4 check all power amplifiers and measure the transfer function (via HOM ports)

• Once all systems are powered at P4, need to conduct a series of EMC measurements – new UPS seems to produce more noise than the previous one:• Conducted UPS noise was a major problem in 2010• Ongoing activity (involving EN/EL, BE/RF, BE/BI, TE/EPC)

LBOC, 15.7.2014


Cold check-out activities (phase 2)

• Check all FGCs, define new functions in the control system (TE/EPC, BE/RF, BE/OP)• Installation ~ September-October• Gains, phase shifts…

• Define new timings (BE/RF, BE/OP)• Multiple independent DACs for different functions (main feedback loop,

witness bunches, AGC/IGC…)

• Dry runs, once SR4 is back in operation (electricity, air conditioning). Expected September-October (BE/RF, BE/OP)

LBOC, 15.7.2014


ADT re-commissioning with beam (phase 3)

• Basic LLRF setting up (phase 3.A):• Could be done in a shadow of other activities. Local work in SR4

(access to the analogue signals)

• Beam Position module expert settings (sampling, bucket 1…)• Digital Signal Processing module expert settings (pickup alignment,

signal chain up to the driver amplifier)

• Beam: pilots circulating for sufficient length of time (>30 minutes)

• Time: few shifts in a shadow of other commissioning

LBOC, 15.7.2014



• Waiting for beam in SR4 during summer is not that terrible…

LBOC, 15.7.2014



• Operation with pilot bunches (phase 3.B)

• Beam Position module setting up:• Dedicated setting up with orbit bumps (phase rotation, intensity related

settings)

• Beam: single pilot circulating

• Time: provided our Matlab tools work with FESA 3 AND we can still access the FBCT and the BPM (orbit feedback) classes: ~4 hours per beam per plane

• Potential problem – some classes still FESA 2.10, new damper FESA 3?

• In case our Matlab tools do not work: ~2 days per beam per plane

LBOC, 15.7.2014



• Operation with pilot bunches (phase 3.C)

• Digital Signal Processing Unit setting up:• Setting up of the “bunch 1” • Setting up of a coarse 1-turn delay (prerequisite for any excitation

or cleaning!!)

• Beam: single pilot circulating. Destructive test, need occasional refill

• Time: ~ 2 hours per beam per plane

LBOC, 15.7.2014



• Operation with pilot bunches (phase 3.D)

• Feedback loop setting up:• Setting up of a fine 1-turn delay and phase shifts for each pickup

• Beam: at least 6, ideally 12 bunches circulating. Single bunches or a reasonably spaced train (not 25ns). Destructive test, need occasional refill


LBOC, 15.7.2014



• White noise excitation for loss maps (phase 3.E):

• Prerequisite: Blow-up application updated to new HW/SW (BE/OP)• Commissioning phase 3.c completed

• Beam: Something circulating, ideally in bucket 1. Destructive test, need occasional refill


• If needed could be conducted just after 3.c

LBOC, 15.7.2014



• Operation with a single nominal bunches (phase 3.F)

• Beam Position module setting up:• Dedicated setting up with orbit bumps (phase rotation, intensity related

settings)

• Beam: single nominal bunch circulating

• Time: provided our Matlab tools work with FESA 3 and we can still access the FBCT and the BPM (orbit feedback) classes: ~4 hours per beam per plane

• Time: in case our Matlab tools do not work: ~2 days per beam per plane

LBOC, 15.7.2014



• Operation with trains, low number (phase 3.G):

• No special setting-up, check of the beam transfer function, eventually fine adjustment of the 1-turn delay

• Beam: train of nominal bunches circulating

• Time: ~1 hour per beam per plane

LBOC, 15.7.2014



• Operation with trains, large number (phase 3.H):

• No need for dedicated setting-up, only few checks in a shadow of other activities

• Beam: train of nominal bunches circulating

• Time: n/a

LBOC, 15.7.2014



• Operation with trains, 25ns bunch spacing (phase 3.I):

• Check of the beam transfer function, fine adjustment of the 1-turn delay

• Other checks/setting up (e.g. digital filters)

• Beam: train of nominal bunches circulating. Destructive test, need occasional refill

• Time: xx hours per beam per plane

• Operational observation system critical (Observation box vs. Expert buffers)

LBOC, 15.7.2014



• Operation with doublet beam (phase 3.J):

• Check of the analogue signals• Setting up of the Beam Position Modules• Other checks/setting up

• Beam: doublet beam in some form

• Time: xx hours per beam per plane

• Operational observation system critical

LBOC, 15.7.2014



• 3.J and 3.K is new territory, difficult to make a realistic estimate of the time required

LBOC, 15.7.2014



• Injection gap cleaning (phase 3.K):

• Prerequisite: Sequencers updated to new HW/SW (BE/OP)• Commissioning phase 3.c completed


• Time: xx hours


LBOC, 15.7.2014



• Abort gap cleaning (phase 3.L):

• Prerequisite: Sequencers updated to new HW/SW (BE/OP)• Prerequisite: AGC application ready and updated to new HW/SW

(BE/OP)• Commissioning phase 3.c completed




LBOC, 15.7.2014


Open questions

• Automatic intensity settings and protection (BE/OP+BE/RF)• Current scheme with the SIS checking the circulating intensity in the

SPS is already quite good• Using this information and having a state machine programming the

front-end gain settings is a logical extension• Some ideas on the algorithm already there• Where should it run, who is responsible tbd.

• Observation system (BE/RF/CS)• Will The Observation Box be ready? Do we still need to use the expert

buffers?• All CCC applications need to be updated to the new source of data

LBOC, 15.7.2014


Overall ADT re-commissioning time-line

LBOC, 15.7.2014

Column1 TimeTotal

time (hr)Beam Nature Details

Phase 1 Cold checkoutPickup cabling, kicker measurements, power amplifiers, EMC measurements

Phase 2 Cold checkout FGCs, LLRF hardware, timings, dry runs

Phase 3.A in a shadow Pilot circulating Basic LLRF setting up

Phase 3.B 4 hr/beam/plane 16 Single pilot circulating Operation with pilot bunches Beam Position module setting up with orbit bumps

Phase 3.C 2 hr/beam/plane 8 Single pilot with refills Operation with pilot bunches Digital Signal Processing Unit setting up the “bunch 1”, coarse 1-turn delay

Phase 3.D 2 hr/beam/plane 86 (12) bunches (single or

train) with refillOperation with pilot bunches

Feedback loop setting up. Fine 1-turn delay and phase shifts for each pickup

Phase 3.E 2 hr/beam/plane 8 Single pilot with refills White noise excitation for loss maps

Phase 3.F 4 hr/beam/plane 16 Single nominal circulating Operation with a single nominal bunches Beam Position module setting up with orbit bumps

Phase 3.G 1 hr/beam/plane 4 Train of nominal circulating Operation with trains, low number No special setting-up, beam transfer function check and 1-turn delay fine adjustmentdelay

Phase 3.H in a shadow Train of nominal circulating Operation with trains, large number No need for dedicated setting-up, only few checks in a shadow of other activities

Phase 3.I min 1/2 shift 4 Train of 25ns with refills Operation with trains, 25ns bunch spacing Beam transfer function check, 1-turn delay fine adjustment. Other checks/setting up (e.g. digital filters)

Phase 3.J min 1 shift 8 Doublet beam circulating Operation with doublet beam Check of the analogue signals, Beam Position Modules setting up, other checks/setting-up

Phase 3.K ?? Anything safe with refill Injection gap cleaning

Phase 3.L ?? Anything safe with refill Abort gap cleaning

Total: min. 72 hours (9 shifts, preferably not in a row)


Summary

LBOC, 15.7.2014

• Number of significant changes is large we consider ADT to be a new system

• All procedures well established, lot of experience from the Run I


Summary

LBOC, 15.7.2014

• ADT is a very complex system, the re-commissioning will be quite demanding involving many people

Provided enough coffee is available… …and enough food is served…

…we should make it!


Thank you for your attention

LBOC, 15.7.2014

adt re-commissioning after ls1 a. butterworth, w. höfle, f. killing, g. kotzian, t. levens, d....

Documents

new functions

adt recommissioning

new system procedures

kickers new clamp

new timings berf

commissioning time

ls1 lboc

rb44 rb46 new clamp