1. Update on ESS Construction Project Charge to the SANS STAP
SANS STAP Meeting
24th of April 2018
Ken Andersen, Neutron Instruments Division, European Spallation Source ERIC

2. Purpose and Remit of Instrument STAPs
Scientific and Technical Advisory Panels
one per instrument class
STAP: instrument advisory body
science case and functional requirements
all aspects which impact on scientific output of instrument (not just instrument project)
technical and project decisions
early science
Advice to both NSS management and instrument teams
collaborative & non-adversarial setting
NSS management & instrument teams take advice constructively
allows NSS management & instrument teams to make good, informed decisions
Each STAP meeting results in written recommendations
followed up in subsequent meeting(s)
presented at following SAC meeting

3. Latest building site update

4. Construction and Operations Budgets
Initial Operations
Steady-State Operations

5. Current Baseline Instrument Ramp-up
Version 17/11/2017, based on Instrument Construction Working Schedule V3.4
Instrument
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
LOKI
ODIN
NMX
ESTIA
CSPEC
DREAM
SKADI
BEER
BIFROST
MAGIC
T-REX
HEIMDAL
MIRACLES
VESPA
FREIA
Instrument 16
Instrument 17
Instrument 18
Instrument 19
Instrument 20
Instrument 21
Instrument 22
5MW
8 instruments in user programme
4MW
3MW
2MW
1MW
Construction Project
Hot Commissioning %
User Programme

6. Re-baselining in Progress
Delays to Conventional Facilities (CF)
changes imposed by Swedish Radiation Protection Authority (SSM) on dealing with earthquake requirements
redesign of target and instrument buildings delaying CF construction by 1-2 years
Timeline
Preliminary dates communicated to instrument teams in December
additional information on instrument installation provided
integrated installation plan presented at IKON /2
updated CF dates received early March
instrument schedule integration workshop 8th May
SAC meeting 3-4/5
external review 22-24/5
Council meeting in June: new baseline approved

7. Science Directorate re-baseline major MS (based on CF building access dates of 12th April)
Hot commissioning MS
NSS ready for Beam on Target (BOT) on 7 July 2022, with Test beam line and 1 or more user instruments ready for hot commissioning
User operations MS
Three user instruments be ready to start operation by end of 2023.
First eight instruments ready to start operation by end of 2024.
C. All fifteen instruments ready to start operation by end of 2026.
Major schedule delays compared to 2016 Baseline:
Beam on Target (BOT) = 21 months
Beam on 1st Instrument = 17 months
Eight Instrument into User Program = 16 months
NSS project completion < 12 months
Preserved milestones:
Start of user program (SOUP) in (with zero float)
NSS project completion in (also with zero float).

8. First out-of-bunker access dates for Instrument Installation
Dec 2019
2 Dec 2019
Black = baseline dates from 2016
Grey = estimation 30th Jan 2018 (shown at IKON14)
RED = fixed dates 12th April 2018
E04
Jan 2020
16 Dec 2019
May 2019
E03
E01
Sep 2019
15 Aug 2019 (incl. crane E01)
E02 (1)
Nov 2019
March – Sept 2021
10 May 2021
E02 (2)
December 2019
D03
Dec May 2021
18 Jan 2021 (crane operational 15 Feb 2021)
D02
D01
April 2020
February 2020
April –Sep 2021 (full D01 same date range)
3 June 2021 (crane operational 26 July 2021)

9. First in-bunker access dates for Instrument Installation
Black = baseline dates from 2016
Grey = estimation 30th Jan (shown at IKON14)
RED = fixed dates 12th April 2018 1.
D01 Aug 2019
July 2020 – Jan 2021
25 Feb 2021
D02
D03 Jun 2019
April - Oct 2020
3 Nov 2020
D02 Feb Oct 2019-March 2020
28 Feb 2020
Start of joint work with Target in D02 (R6, NBOA & LS etc.)
Start of bunker work in D01 & D03 2.
D01 Dec 2019
March – Sep 2021
11 Aug 2021
D02
D Dec 2019
June – Dec 2021
9 July 2021
Start of first in-bunker access for Neutron Instrument construction

10. Proposed rebaseline schedule for NBI. Installation (TG4 –> TG5) (V4
Proposed rebaseline schedule for NBI* Installation (TG4 –> TG5) (V4.-0.4, 12th April 2018)
(based on CF building access dates of 12th April
NSS access to E01
Start User Program (3NBI*)
Beam on Target
NSS access to D01
NSS access to D03
8 NBI* in User Program
Cave installation & fitout
OOB Guides & shielding
In bunker installation
Cold commissioning
NSS access to E02/2
West sector
North sector
East and South sectors
* NBI = Neutron Beam Instrument

11. Selection of first instruments for SOUP in Q1, 2023
Proposed rebaseline schedule for Neutron Beam Instruments (V4.-0.4, 12th April 2018)
West sector
North sector
East and South sectors
Current date
First access to NSS bldgs (E01)
Start User Program (3NBI*)
BOT & start HC of NBI*
8NBI* in User Program
Preliminary Design
Detailed Design
Manufacturing & Procurement
Installation & Integration
Hot Commissioning/Early science
Operation
Safest instrument choices to be Ready for SOUP are in the West sector (BEER, CSPEC, BIFROST & MAGIC)
Most desirable instrument choices for early science highlights are in the South and North (ODIN, DREAM & LOKI)
Selection of first instruments for SOUP in Q1, 2023
* NBI = Neutron Beam Instrument

12. Action items and Highlights from November SANS STAP meeting
J. White should present hard-matter SANS and sample environment
More information on process and strategy for choosing and building instruments 16-22
LOKI issues:
divergence and spatial profile of beam directly after bender
Accessibility, exchange, realignment of in-bunker optics
Band-GEM detectors are geometrically ill-adapted
front detectors should not have lower spatial resolution than rear detectors.
go for incomplete but upgradeable day-one detector coverage
clarify if electronics solution exists for boron-straw detectors
critical decision needed on detector technology
SKADI issues:
deflector geometry is promising and needs further study
SKADI should move ahead quickly despite not being in the first 8
SONDE detectors cannot be ordered fully assembled
apparently only on supplier exists for the photo-multipliers
some FPGA development is needed to handle multiple detector elements
could modules be made available for LOKI?
Not convinced that the high-resolution mode has a strong scientific case
doubts about reliability of resolution and flux calculations
fine as an upgrade path
not justified by stroboscopic studies which are anyway enabled by event mode data collection
not convinced by inelastic measurement possibilities

13. Other points from November SANS STAP meeting
Software plans basically OK
not on agenda this time
Sample environment plans basically OK
a strategy for high throughput is lacking
standard movement axes need to be provided
beam movement needs to be considered
carefully consider practicality and limitations of pallet system
Are LOKI and SKADI designs inconsistent?
Lack of neutronics advice and calculations
Timeline for LOKI and SKADI projects

14. Charge to the SANS STAP, April 2018
Does the STAP support the LOKI proposal on detector technology?
Does the STAP support the chosen options for in-monolith optics on LOKI and SKADI?
Has the SKADI team addressed the concerns on sample area accessibility and ergonomics?
Which collimation solution should LOKI choose?
Current plans for hard-matter studies on SANS at ESS:
to what extent will they provide for world-leading science?
what needs to be done to ensure that LOKI and SKADI can support world-leading science in this area?
We are considering merging the SANS and Reflectometry STAPs:
please discuss and advise
Format of October STAP meeting:
face-to-face, video-conferencing, correspondence?

15. Thank you!
ESS site 2016
5th June 2015