Celebration of Dorfan/Hitlin Panofsky Prize January 13, 2016 Thoughts on PEP-II and Jonathan Dorfan

Receiving a Prize of this caliber is a great honor but Receiving a prize that bears Pief’s name makes it doubly special As a scientist and administrator, I strove to emulate Pief’s unflinching dedication to:  Above all, the science must be outstanding  Technical innovation moves science/humanity forward  People are the most critical resource: respect & nurture them  International cooperation is essential to science  Never allow expediency to undermine integrity: stand firm for what is “right”

A Long Collegial and Personal Friendship : David was spokesman of my thesis expt., E92 at SLAC ~1980: MARKII Liquid Argon Calorimeter construction, testing, commissioning 1989 – : B Factory, PEP-II/Babar

Slide Courtesy of Pier Oddone

This led to at least 21e+e- B Factory concepts and proposals (19 Y (4S) + 2 Z0) and several hadronic machine approaches (HERA-B,.. Pier Oddone’s concept of using an asymmetric e+e- collider to boost the distance between the two decay vertices was, in the end, the most successful approach. Table Courtesy David Hitlin Two colliders, PEP-II and KEKB, were ultimately built Y ( 4S ) Storage Rings Y ( 4S ) Linac- Ring Collider Y ( 4S ) Recirculating Linear Collider Z Factory SymmetricAsymmetric PSI (2)APIARYGrosse- Wiesman n Amaldi/CoignetSLC NovosibirskCITARJLABARESLEP KEK accumulator PEP-IIUCLA CESR PlusPETRATBA ISR Tunnel KEK accumulator KEK-B CESR-B

Slide Courtesy of Pier Oddone

Early PEP-II Ring Layout (two tunnels) (1989) Page 7

Workshop in Chateau de Blois, Blois, France: Summer 1989 CP violation and beauty factories and related issues in physics

Workshop in Chateau de Blois, Blois, France: Summer 1989 CP violation and beauty factories and related issues in physics

SLAC Colloquium March 1990 – Two rings in one tunnel

1990

Sin2  ~ Sin2  ~ 0.95

1991

John O’Fallen: The believer The Sponsor : DOE On-Site Oversight Office Danny Lehman: Uber “Auditor”

The Funders : Congress

PEP-II Central Management Special Assistant Whatever Needed To Be Done Safety Data Management Administration

PEP-II Construction “System Managers” High Energy Ring Low Energy Ring Injection Controls RF Utilities Installation Backgrounds, Interaction Region

Sampling of Personnel That Worked on the Early Design And/or that were part of the Construction Team

e - (e + ) at end of New Injection Lines: Oct ’95 (97) e- beam through 1/3 of HER : May ‘97 Stored e- beam in High Energy Ring: June ‘97 e+ beam to Low Energy Ring Arc 7 Temp. Dump: Jan 98 Strategy of Staged Completion and testing of the major subcomponents with real beam

Measure/Characterize the backgrounds before Babar moved on line

U. Wienands, SLAC B-Fact. Symposium, 27-Oct-08 26

U. Wienands, SLAC B-Fact. Symposium, 27-Oct x10 34 /cm 2 /s !! 1875 mA/HER 2900 mA/LER 1722 bunches ≈154/fb

U. Wienands, SLAC B-Fact. Symposium, 27-Oct PEP-II Turned Off April

* October 27, 2008PEP-II BaBar SymposiumPage 58 PEP-II Team April 2008

Receiving a Prize of this caliber is a great honor but Receiving a prize that bears Pief’s name makes it doubly special As a scientist and administrator, I strove to emulate Pief’s unflinching dedication to:  Above all, the science must be outstanding  Technical innovation moves science/humanity forward  People are the most critical resource: respect & nurture them  International cooperation is essential to science  Never allow expediency to undermine integrity: stand firm for what is “right” These principles were all necessary, and more importantly, ever-present for the success of the PEP-II a adventure