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  • Alexandre Camsonne, Silviu Covrig, Mark K. Jones, Jian-Ping Chen (JLAB)
  • Marie Boer, Gabriel Charles, Raphael Dupre, Michel Guidal, Dominique Marchand,Carlos Mu~noz Camacho, Silvia Niccolai, Eric Voutier ( IPN Orsay )
  • Zhiwen Zhao (ODU)
  • Kondo Gnanvo, Nilanga Linayage, Chao Gu (UVA)
  • Zhihong Ye (Duke)
  • Evaristo Cisbani (INFN Sanita)
  • Guido Maria Urcioli ( INFN Roma )
  • Vincenzo Bellini, Concetta Maria Sutera ( INFN Catagna )
  • Hamza Atac, Adam Blomberg, Sylvester Joosten, Zein-Eddine Meziani, Michael Paolone, Nikos Sparveris (Temple)
  • Anthony W. Thomas (CSSM Adelaide Australia)
  • Maxime Defurne, Herve Moutarde, Franck Sabatie (IRFU CEA Saclay)
  • Malek Mazouz (Faculte des sciences Monastir Tunisia )
  • Paul Gueye (Hampton University)
  • Whitney Armstrong (ANL)
  • Thomas Hemmick (Stony Brook University )

Letter of intent submitted to PAC43

latest version

Theory TAC PAC43

Experimental TAC report

PAC 43 report

DDVCS Proposal work for next SoLID collaboration meeting in May 2016

Mailing list

Register to the mailing list at :

meetings DDVCS



  • Double deeply virtual Compton scattering off the nucleon
 M. Guidal (Orsay, IPN), M. Vanderhaeghen (Mainz U., Inst. Kernphys.). Aug 2002. 4 pp.
 Published in Phys.Rev.Lett. 90 (2003) 012001
 DOI: 10.1103/PhysRevLett.90.012001
 e-Print: hep-ph/0208275 PDF  [1]
  • Exclusive electroproduction of lepton pairs as a probe of nucleon structure
 A.V. Belitsky (Maryland Uni.), D. Mueller (Wuppertal Uni.). Oct 2002. 4 pp.
 Published in Phys.Rev.Lett. 90 (2003) 022001 [2]
  • Probing generalized parton distributions with electroproduction of lepton pairs off the nucleon
 A.V. Belitsky (Maryland Uni.), D. Mueller (Wuppertal Uni.). Oct 2002. 4 pp.
 Published in Phys.Rev.D 68 (2003) 116005
  • Unraveling hadron structure with generalized parton distributions
 A.V. Belitsky (Arizona State U.), A.V. Radyushkin (Jefferson Lab & Old Dominion U.). Apr 2005. 370 pp.
 Published in Phys.Rept. 418 (2005) 1-387
 DOI: 10.1016/j.physrep.2005.06.002
 e-Print: hep-ph/0504030 | PDF

Presentation talks

INT workshop September 30th 2009, DDVCS with SoLID : The JLab Hall A experimental program at 12 GeV [3]

DVCS collaboration meeting IPN Orsay November 2012 pptx

Hall A collaboration meeting December 2012 DDVCS with SoLID pdf

Study of feasibility of DDVCS with SuperBigBite -DVCS collaboration meeting - December 2013 pdf

SBS collaboration - DDVCS update - July 7-8 2014 [4]

The Sixth Workshop on Hadron Physics in China and Opportunities in US, Lanzhou July 24, 2014 : Overview of the Generalized Parton Distributions program pdf

SoLID Collaboration Meeting May 14 -15, 2015 Jefferson Lab Newport News, VA USA [5] [6]

INPC 2016 Double Deeply Virtual Compton Scattering Opportunities at Jefferson Laboratory [7]




  • MEMUS – A large solid angle detector for ELFE ps
 Nuclear Instruments and Methods in Physics Research 
 Section A: Accelerators, Spectrometers, Detectors and Associated
 Equipment, Volume 409, Issue 1, Pages 400-401
 G Audit et al.
  • Solenoidal LOI PAC 27 [9]




[Setup picture archive]

SoLID setup 20140901 PVDIS arrow.png

SoLID setup 20140901 SIDISandJPsi arrow.png

Event generator

DEEPGen 2018 version DEEPGen event generator

use grape-dilepton for BH as signal rate estimation, refer to Dilepton

- DDVCS+BH event generator: DDVCS and TCS event generator


refer to general "solid_gemc" instruction

full simulation

subsystem simulation and study

data file sharing

  • BH file
see details how to run it and analysis result at
  • background simulation

Repository for software and proposal

You need a GitHub account to acces the repository, send a mail to camsonne [at] with your GitHub username so I can add you to the repository :

Google Drive for file sharing DDVCS






Superconducting detectors

Pizza Seminar September 24th 2014 [pptx]


Front End

  • MPD
  • SRS
  • CLAS12 readout


  • APV25
  • VMM2

Particle ID

Light Gas Cerenkov

Heavy Gas Cerenkov

Time of flight


Scintillator Pad


Muon detector


SuperBigBite DOE review november 2014

SuperBigBite Hadron Calorimeter [[10]]

15 cm x 15 cm x 100 cm
  • CLEO muon detector

  • Phenix


Statistical requirement

  • Asymmetry

In the case of small asymmetries, the statistical uncertainty on the measurement of an asymmetry reduces to

<math> \delta A = 1 / \sqrt{N} </math>

telling that 2500 Events are required to deliver a 2% absolute uncertainty on the measurement of an asymmetry. In order to obtain a reasonable understanding of the <math> \varphi </math> distribution, 10 bins in the out-of-plane angles are required asking then about 25000 Events at a given fixed kinematics setting defined by <math> ( Q^2, \xi, \eta, t) </math>.

CAD files CLEO magnet

You can use FreeCad to open the STEP file

[CLEO magnet files]

[Scans of paper schematics]