future linear colliders · future linear colliders: this is about something that has not been...

John Jaros SymposiumSLAC National Accelerator Laboratory

May 17, 2019

Future Linear CollidersHarry Weerts

Scientist EmeritusArgonne National Laboratory

Jaros Symposium, May 17, 2019, SLAC, H.Weerts1

Future Linear Colliders:This is about something that has not been realized yet.But a lot of work has been done on its design.

Found out about your retirement in October 2018 when talking to Tim Nelson on how to make bread in a break at the Dark Matter BRN in Washington

And here we are to celebrate your career


Intro

To John

To understand and appreciate that work, need to put it in bigger context…………

Future Linear Colliders:This is about something that has not been realized yet.


Intro

This talk:

Not about the International Linear Collider (ILC)

About one of the two detectors and its design effort from about 2004 through 2013

Height: ~14m

Impossible to talk about detector work, without talking about ILC

International Linear Collider

SiD detector

GDE well funded & organized; detectors left up to community, basically no funding

• Global consensus that next machine should be a 500GeV electron-positron linear collider, called the ILC. Form Global Design Effort (GDE) to design ILC.

• A lot of momentum and activity worldwide to cooperate and there was funding.• There were 3 concepts for detectors ( Europe, Asia and US). US = SiD


Big picture in Linear Collider– give some context, set the stage Very abbreviated personal view

2005, LCWS05

SLAC

2007, ACFA07

Beijing

• GDE presents first cost estimate for accelerator ( ~$6.5B + manpower) in Reference Design Report (RDR).

• US –DOE basically did not see way to keep going.• Continue to fund GDE to complete the design and continue R&D

RDR contained description of performance needs of detectors. No details.

2010 -2011

• Difficult time in US and worldwide. Unclear how to fund ILC with expected costs.• Work on ILC Technical Design Report(TDR) continued• In Europe CERN works on design of CLIC a 3000GeV linear collider + report

2012 • Higgs discovery at CERN LHC with mass =125GeV.

2013• ILC TDR is delivered; cost estimate similar as 2007. GDE is done.• Start Linear Collider Collaboration (LCC) including ILC and CLIC

2019 • Japan is only country interested in hosting ILC, but no decision… waiting• CLIC at CERN still an option… European Strategy

Both ILC and CLIC designs are now Higgs factories (~250 GeV); lower energy & cheaper

Start SiD design and R&D.Assemble “collaboration”

• Global consensus that next machine should be a 500GeV electron-positron linear collider, called the ILC. Form Global Design Effort (GDE) to design ILC.

• A lot of momentum and activity worldwide to cooperate and there was funding.• There were 3 concepts for detectors ( Europe, Asia and US). US = SiD


Big picture in Linear Collider– more SiD specific

2005, LCWS05

SLAC

2007, ACFA07

Beijing

• GDE presents first cost estimate for accelerator ( ~$6.5B + manpower) in Reference Design Report (RDR).

• US –DOE basically did not see way to keep going.• Continue to fund GDE to complete the design and continue R&D

Produce Detector Outline Document (DOD)

2010 -2011

• Difficult time in US and worldwide. Unclear how to fund ILC with expected costs.• Work on ILC Technical Design Report(TDR) continued• In Europe CERN works on design of CLIC a 3000GeV linear collider + report

2012 • Higgs discovery at CERN LHC with mass =125GeV.

2013• ILC TDR is delivered; cost estimate similar as 2007. GDE is done.• Start Linear Collider Collaboration (LCC) including ILC and CLIC

2019• Japan is only country interested in hosting ILC, but no decision… waiting• CLIC at CERN still an option… European Strategy

Down select to 2 detectors and SiD is one of them.Letter of Intent (LOI) document exists.

SiD is one of 2 detectors in ILC TDR.

CLIC detector based on SiD design

Time line of John and Harry

~1980 20001990 2003 20122004 ----- ~2010

Harry

John

20182015


Time line of John and Harry with interactions

The clouds contain many other people !!

~1980 20001990 2003 20122004 ----- ~2010

Harry

John

20182015

e+e-

pp

SiD @ ILC

Dark sideILCHEPJaros Symposium, May 17, 2019, SLAC, H.Weerts

7

2003 Was on DPF nominating committee; asked John to be Divisional Councilor for APS DPF….. And he agreed

2004 Jim Brau convinces John Jaros and myself to lead SiD concept design study John and I “join at the hip” for several years

2004- 2013 John and Harry are spokespersons of the SiD design

In next part will give more details of specific events, at certain times and which I remember…….. But it is by no way complete


Thanks to Jim Brau

From SiD history pageat https://silicondetector.org/ check


SiD talk at ALCPG 2004 at Victoria on July 30, 2004

Role out a new, more global effort with new, additional leadership.

History

July 13-14, 2004

• Meeting at SLAC between Jim Brau, John Jaros, Marty Breidenbach and Harry Weerts

• Lay out approach for future of SiD and organization• John and Harry agree to be spokespeople


History SiD talk at ALCPG 2004 at Victoria on July 30, 2004


SiD talk at ALCPG 2004 at Victoria on July 30, 2004

History


Enter into a many years of effort to turn the concept ideas from 2004 into a detector design that is simulated, has engineering effort in it i.e. it is not just suspended in air and is as realistic as possible on paper, without actually building it..

History

2004 until now…

Make SiD more global and involve other regions of the world.Attend meetings across the globe, give talks, present the design, get people interested

Lot of travel

Keep ultimate goal in mind.People have strong opinions

Keep all ideas alive for a while, let people and ideas compete while you are trying to come up with reasonable choices, sometimes compromisesTry to build a collaboration, keep a group of people together who all have different ideas and opinions and help them arrive at a common endpoint, without loosing anybody….

Interface it to the accelerator by interacting with Machine Detector Interface (MDI) group, which was very strong at SLAC; always part of SiD

Developing simulations and algorithms for SiD, while also being part of a global effort. Try to keep in sync. Strong effort at SLAC.


History

A lot of fraction here

Do all of the above with minimal resources and funding.Funding only available for specific R&D, have also application outside SiDNo funding for effort on designStill respond to requests from GDE/ILC for documentation and final design.

Encourage R&D on detector technologies.Interface with independent R&D collaborationsSometimes conflict with what SiD wanted to do and what R&D collaborations did.

John instrumental to smooth out

SiD had very good tools here

Keep cost under control, while optimizing the physics performanceAlways pressure for cost to rise

Even within SiD……. Example HCAL SLAC Argonne

Even as interest in ILC was decreasing, especially after ~2009

Compete with other detector concepts for a spot in interaction region.There was a down select from 3 detector concepts to 2 in 2009. SiD was one of the 2 validated detectors.

This resulted in the Letter of Intent (LOI) for SiD.Really a conceptual design report ( a 156 page letter !)

• In 2009 SiD was validated as one of the two detectors for the ILC

• SiD will be included in the 2013 ILC TDR.


During 2010 and 2011 some of us in SiD got involved in the CLIC effort at CERN.

Many of the ideas and concepts from SiD became the starting point for the CLIC detector design concept.

History


History

John and I were done….Moved on the other things

Time scale for when a version of the SiD detector might be realized/built was very unclear

Something every experimentalist wants to do…….

John had already started working on new experimental searches for Heavy Photons and a potentially taking data in next few years.

After ~2010 it became more difficult to maintain effort in SiD.Future was unclear and funding, especially in US, was very difficult for detector work.

At least to John and myself…..

In 2012 Andy White joined us as spokesperson for SiDBasically so John and I could pursue other things.Early 2013 Andy White and Marcel Stanitsky took over as spokespeople of SiD.


History

The previous slides were my attempt to recount some of SiD history

Remaining slides are some visual evidence of the travel and work associated with SiD activities over several years.


A few months before our initial meeting at SLAC

Linear Collider Workshop 2004 in Paris LCWS04

Jo, Ellie, John, Harry and many others at SiD dinner in Oxford.

Are John and Harry’s hands synchronized ?????Or is it total synchronization ??


SiD workshop in UK at RAL April 2008

ACFA 2007, Beijing


John is a world traveler and has powerful people that watch over him, wherever he goes………


LCWS 2010 Beijing China SiD table closes the banquet……..


LCWS 2010 Beijing China SiD table closes the banquet……..

We also have all the remaining food and drinks ……..

Poor quality; shot with old Blackberry phone


Sometimes the travel and time changes were just too much……..

Narita airport lounge

Of course John never slept

Including SiD to CLIC at CERN…..

Hard at work in Lake Geneva “moving SiD” to CERN


Still on org chart ……


Today

SiD Executive committee meetings, Monday at 8:00am Pacific, which we started in 2005 still happen today

So what came out of all this ?

Thought hard and long …….. Conclusion:


A well documented and well simulated design of the SiD detectorA lot of R&D on detector technologies and prototypes in some cases

No constructed detector yet


Thought hard and long …….. Conclusion: T shirts and hats with ILC logos and symbols


Small sample of many that exist around the world


Thought hard and long …….. Conclusion:

Even though there is not a new accelerator, facility or detector and no new physics results………….the ILC and especially the work on coming up with a very unique and forward looking SiD detector that can address the physics at any future e+e-collider resulted in:

New relationships and friendships with colleagues that at one time were competing in science.

It has been a unique experience and honor for me to work with colleagues from SLAC and other institutions on ILC and SID and that is

especially true for you

THANK YOU !!

John Jaros


future linear colliders · future linear colliders: this is about something that has not been...

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