dm_task_force [Assay and Acquisition of Radiopure Materials]

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===== Dark Matter Depth Task Force =====
=== Where shall we publish our White Paper?? ===
[[:dm_task_force:references|Reference Link]] is a page where you can list journals or ideas
=== Particle Files ===
  *  [[http://cdmsnano.fnal.gov/xfer/simData/|GeodmHomestakeCosmo]] Groom Parameterization of muons at Homestake depth, propagated through rock using GEANT4  v4.9.3 P02 with new mu-nuclear to produce neutrons and all secondaries.  Assumes a flat overburden, but has a good angular distribution of incoming neutrons.  Uses “Soudan” rock.
  * Muons generated via MUSUN, taking account of the geography and geology of the Homestake site.  Muons then propagated through rock using GEANT4 v4.9.5 to produce neutrons and all secondaries. [[http://people.usd.edu/~Chao.Zhang/|MUSUN+GEANT4]]
  * [[http://example.com|External Link]] Muons generated via MUSUN, taking account of the geography and geology of the Soudan site.   Muons then propagated through rock using GEANT4  v4.9.3 P02 with new mu-nuclear to produce neutrons and all secondaries.  
=== Geometry Files ===
  * [[http://zzz.physics.umn.edu/lowrad/_media/luxsimlz20simple.cc.pdf|Link to LZ geometry]]
  * LXe Geometry and pictures {{::20121227_pangilinan_lz20geometry.pdf|Monica's slides}}
  * LAr Geometry and pictures {{::dm_task_force:geometerandfluxatboundaries.pdf|Chao's slides}}
  * Ton scale LAr from Andrew Hime pictures{{:lar_geometry.pdf|Andrew Hime's slides}}
  * GE Geometry and pictures {{::geodmgeometry.pdf|Angie's slides}}
=== Choice of Analysis Cuts ===
== LXe ==
  * Current Livetime =  2.12 years and Number of single NR after all cuts except muon veto = 0
  * veto on muon entering water shield
  * Energy ROI is 5 - 25 keVnr
  * veto on electron recoil energy < 50 keVee deposited in liquid Xe, 
  * fiducial cut: r < 93cm & |z| < 84 cm, 
  * multiples cut - σr < 3cm & σz < 0.2cm
== Ge ==
  * Current Livetime =  169.1 years and Number of single NR after all cuts except muon veto = 26
  * veto on muon entering water shield
  * Energy ROI is 5-100 keVnr
  * Yield cut = no ER of more than 10%
  * single detectors of 10cm diam and 1 inch thickness, multiples down to 2 keVnr
== LAr ==  
  * Current Livetime =  6.41 years and Number of single NR after all cuts except muon veto = 0
  * veto on muon entering water shield,
  * Energy ROI is 50-100 keVnr (energy resolution 8%)
  * 55 cm from wall (resolution of a couple cm)
  * de-excitation gamma - fPrompt from inelastic scatter
  * multiples are included in the timing cut = >6 cm

== GEANT4 Physics ==
  * To coordinate the simulations it has been agreed that we will try to ascertain which physics lists are used for each study.  In general, we will continue to work with v4.9.3 P02 modified with new muon-nuclear before switching (mid-december) to v4.9.5 which intrinsically has this mu-nuclear interaction.  It has been pointed out that it is best to not only use esoteric version and physics list names but also try to be clear about which physics is included.  The table below contains information in this direction.  Eventually, we hope to be able to relate in a concise way what all the physics processes included are so there can be no ambiguity. 

^ Version      ^ Physics List(s)       ^ Accurate Mu-Nuclear available?         ^ Sheilding available?  ^
| v4.9.3 P02  | QGSP_BERT_HP, Mu-Nuclear (not in release)  | not intrisically  | not intrinsically |
| v4.9.5    |  QGSP_BERT_HP OR Shielding    | yes  | yes |

   * The way the physics lists work is that a single list is to be included at a time.  The relevant lists which are available are listed in this [[dm_task_force:physics_lists|page]].  These lists have been used starting in v4.9.4 with the exception that the QGSP_BERT_HP list has been used (with the new muon-nuclear interaction) with the backported v4.9.3 P02

==== White Paper Work ====
[[:dm_task_force:whitepaper|outline]]
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==== TABLE of Comparisons ====
Reference methods as follows 
  * **0. The simple LXe Monte Carlo** (4850 level) with isotropic angular distribution on a sphere  (Monica)
  * **1.“Groom” Parametrization** of muons at Homestake depth, propagated through rock using GEANT4  v4.9.3 P02 with new mu-nuclear to produce neutrons and all secondaries.  Assumes Soudan rock and a flat overburden, but has a good angular distribution of incoming neutrons.  
  * **2. Best Model: Homestake MUSUN Muons + GEANT4**, taking account of the geography and geology of the Homestake site prepared by Chao and Angie.  Muons are then propagated through rock using GEANT4 v4.9.5 to produce neutrons and all secondaries. 
  * **3. Homestake MUSUN Muons + FLUKA**: Muons generated via MUSUN, but then propagated through the rock via FLUKA (Raul and Angie)
  * **4. Neutron Parameterization **: Muons generated via MUSUN, but then creating a Neutron parametrization instead of all secondaries (Chao)  
  * **5. Soudan MUSUN Muons + GEANT4**: Muons generated via MUSUN, taking account of the geography and geology of the Soudan site.   Muons then propagated through rock using GEANT4  v4.9.3 P02 with new mu-nuclear to produce neutrons and all secondaries. (Angie and Melinda)
  * **6. The Neutron Multiplicity Meter** (2100 mwe) with cosnθ distribution (partly derived from existing flux  measurements) 


== Muons per sec per sq meter hitting the top of the water tank (downward) + spectrum (50GeV bins) if available ==
    * 4.4 E-5 (Simple LXe MC)  Uses M&H muon flux rate at Homestake.    
    * 4.4 E-5 (Groom on LXe geometry) Explicitly tied to M&H rate. 
    * 6.46 E-5 (Homestake MUSUN + FLUKA on LXe geometry - Angie and Alex)  Explicitly tied to Chao's MUSUN rate {{muonsthrutop.png?20}}
    * 6.46 E-5 (Neutron parameterization for LXe geometry) Deduced by MUSUN+GEANT4
    * 6.46 E-5 (Best Model on GE geometry - Angie and Shaun) rhel6 {{geomuspectfinal.png?20}} Explicitly tied to Chao's MUSUN rate.
    * 6.46 E-5 (Best Model on LXe geometry - Angie)  {{lzmuspectfinal.png?20}} Explicitly tied to Chao's MUSUN rate.
    * 6.46 E-5 (Best Model on LXe geometry - Monica)  {{20120808_mu_water_spec.jpg?20}} Explicitly tied to Chao's MUSUN rate.
    * 6.46 E-5 (Best Model on LAr geometry - Chao) {{:muon_tank_walls.png?20}}

== Muons per sec per sq meter hitting all outer walls of the tank (from out to in) ==
    * 4.4 E-5 (Simple LXe MC)     
    * 7.3 E-6 (Groom on LXe geometry) 
    * 1.75 E-5 (Homestake MUSUN + FLUKA on LXe geometry - Angie and Alex)
    * 1.84 E-5 (Neutron parameterization for LXe)
    * 1.76 E-5 (Best Model on GE - Angie and Shaun) rhel6
    * 1.77 E-5 (Best Model on LXe - Angie)
    * 1.76 E-5 (Best Model on LXe - Monica)
    * 2.11 E-5 (Best Model on LAr geometry)

== Neutrons (with KE > 100 KeV) per sec per sq meter hitting the top of the water tank (downward) + spectrum (all energies, 50MeV bins) ==
    * 1.7 E-6 (Simple LXe MC) {{:neutron_water_tank_spec_11dec19.001.png?20}} 
    * 1.9 E-6 (Groom on LXe geometry) {{dm_task_force:geodmwithluxnspectrum.png?20}}
    * 1.16 E-6 (Homestake MUSUN + FLUKA on LXe geometry - Angie and Alex) {{neutronsthrutop.png?20}}
    * 2.91 E-6 (Neutron parameterization for LXe) Normalized to MUSUN muon rate and then each neutron is parameterized singly
    * 2.59 E-6 (Best Model on GE - Angie and Shaun) rhel6 {{neutsketopwatertank_may27.png?20}} 
    * 2.72 E-6 (Best Model on LXe - Angie)  {{lzneutsbeforeshielding.png?20}} 
    * 2.08 E-6 (Best Model on LXe - Monica){{20120808_n_water_spec.jpg?20}}
    * 1.87 E-6 (Best Model on LAr - Chao) {{:neutron_tank_walls.png?20}}

== Neutrons (with KE > 100 KeV) per sec per sq meter hitting all outer walls of the tank (from out to in) +spectrum (all energies) == 
    * 3.6 E-6 (Simple LXe MC) Uses M&H muon-induced neutron flux rate at Homestake. {{:neutron_water_tank_spec_11dec19.001.png?20}} 
    * 2.4 E -6  (Groom on LXe geometry) {{dm_task_force:geodmwithluxnspectrumAll.png?20}} 
    * 9.01 E-7 (Homestake MUSUN + FLUKA on LXe geometry - Angie and Alex) {{neutronsoutwater.png?20}}
    * 1.13 E-6 (Neutron parameterization for LXe) Normalized to MUSUN muon rate and then each neutron is parameterized singly 
    * 2.27 E-6 (Best Model on GE - Angie and Shaun) rhel6 {{neutskethroughwallswatertank_may27.png?20}} 
    * 2.05 E-6 (Best Model on LXe - Angie) {{lzneutsinwardbeforeshielding.png?20}}
    * 1.83 E-6 (Best Model on LXe - Monica) {{20120808_n_water_spec.jpg?20}}
    * 1.83 E-6 (Best Model on LAr)

== Neutrons (with KE > 100 KeV) per sec per sq meter entering detector volume + spectrum ==
    * 3.4 E -10 (Simple LXe MC) Requires some energy deposition (NR or ER) in the liquid Xe since we did not store all events that pass into the detector {{:neutron_spec_detector_11dec19.001.png?20}}   
    * 5.9 E -7 (Groom on LXe geometry)  {{dm_task_force:geodmwithluxnspectrumInner.png?20}}
    * 3.23 E-7 (FLUKA on LXe geometry - Angie and Alex) {{neutronsinwater.png?20}}
    * 1.00 E-8 (Neutron parameterization for LXe) singly thrown parameterized neutrons
    * 2.38 E-6 (Neutron parameterization for LXe) parameterized muons creating neutrons in the shield  
    * 4.90 E-6 (Best Model on GE BLock only) 
    * 5.97 E-7 (Best Model on GE Towers - Angie and Shaun) rhel6 {{neutskeenteringdetvol_may27.png?20}}
    * 1.00 E-5 (Best Model on LXe - Angie)  defined as Monica's below.  When defined inside water shield, r=1.8m, rate is 2.77E-7
    * 1.26 E-5 (Best Model on LXe - Monica) {{:20120808_n_xe_spec.jpg?20}}  Defined as neutron with E > 100
    * 5.48 E-6 (Best Model on LAr). R=1m & H=2m.{{::neutron_reaching_ar.png?20}}

== Events per sec that have at least one NR (no other cuts) ==
    * 5.44 E -8 (Simple LXe MC) for NR_dep > 5 keV_r; 5.42 E -8 for NR_dep > 10 keV_r
    * 4.9 E -5 (Groom on LXe geometry)
    * 1.13 E -8 (Neutron parameterization for LXe) singly thrown parameterized neutrons (NR_dep > 5 keV_r)
    * 5.84 E -5 (Neutron parameterization for LXe) parameterized muons creating neutrons in the shield(NR_dep > 5 keV_r)
    * 6.25 E -5 (Best Model on GE Block only) no identifiable cut, 10-100keV edep in Ge detectors
    * 4.96 E -6     (Best Model on GE towers - Angie and Shaun) rhel6, no identifiable cut, > 5keV edep in Ge detectors
    * 3.10 E -5 (Best Model on LXe - Angie) for edep>5keV.  
    * 1.23 E -4 (Best Model on LXe - Monica) for NR_dep > 5 keV_r
    * 1.25 E -5 (Best Model on LAr - Chao) for NR_dep> 5 keV_r; 1.23E-5 for NR_dep>50 keV_r. 

== Events per sec that have at least one NR and are in the Energy ROI ==
    * 5.44 E -8 (Simple LXe MC) for NR_dep > 5 keV_r; 5.42 E -8 for NR_dep > 10 keV_r
    * 4.9 E -5 (Groom on LXe geometry)
    * 1.13 E -8 (Neutron parameterization for LXe) singly thrown parameterized neutrons (NR_dep > 5 keV_r)
    * 5.84 E -5 (Neutron parameterization for LXe) parameterized muons creating neutrons in the shield(NR_dep > 5 keV_r)
    * 4.28 E -6 (Best Model on GE Towers -  Angie and Shaun) rhel6, no identifiable cut, 10-100keV edep in Ge detectors
    * 1.1 E -3 (Best Model on LXe - Angie) for edep>5keV.  for 5-25keV cut, get 7.5E-4 events/s, no identifiable cut
    * 4.70 E -5 (Best Model on LXe - Monica) 
    * 1.16E -7   (Best Model on LAr - Chao) for NR_dep within [50, 100] keV_r


== Rate of Single WIMP candidates in entire volume (All analysis cuts except fiducial and veto) ==
    * 1.1 E -10 (Simple LXe MC) for NR_dep > 5 keV_r & Single Scatter cut ( σr < 3cm & σz < 0.2cm); 1.0 E -10 for NR_dep > 10 keV_r    
    * 5.9 E -7 (Groom on LXe geometry)
    * < 4.26e-12 (Neutron parameterization for LXe) singly thrown parameterized neutrons with upper energy limit **need limit removed**
    * 7.26e-9 (Neutron parameterization for LXe) parameterized muons creating neutrons in the shield
    * 8.30 E-8 (Best model on Ge Towers - Angie and Shaun)  
    *  < 1.49 E - 8 (Best model on LXe  - Monica) There are 0 events so I use the limit of 1 event in total livetime (~2.12 years) -> need more stats 
    * 1.60 E -8 (Best model on LAr - Chao) single NR_dep within [50, 100] keV_r (10 events in 19.81 years)
== Rate of Single WIMP candidates in Fiducial Volume (ignore veto) ==
    * 3.2 E -12 (Simple LXe MC) WIMP Candidate: pass NR, Single Scatter, Elastic, and Fiducial Cut.  NR cut:  NR deposits in liquid Xe: 5 - 25 keVr. Single Scatter Cut:  σr < 3cm & σz < 0.2cm, Elastic Cut: ER < 50 keVee in liquid Xe, Fiducial Cut: r < 93cm & |z| < 84 cm
    * < 1.49 E - 8 (Best model on LXe  - Monica) There are 0 events so I use the limit of 1 event in total livetime (~2.12 years) -> need more stats 
    * < 1.60 E -9 (Best model on LAr - Chao) Set up a limit for livetime 19.81 years.

== Veto ratio (vetoed : unvetoed) for single WIMP candidates in the fiducial volume  ==
    * 117:0 (Best model on Ge Towers - Angie and Shaun) veto definition:  muon (>100MeV) enters or exits water tank)      
    * 0:0 (Best model on LXe - Monica)

== Veto ratio for multiple NR. (not applicable for liquid argon) ==
    * 9081:9 (Best model on Ge Towers - Angie and Shaun) 
    * 6978:0 (Best model on LXe - Monica) Muon entering water tank must have at least 1 GeV energy

=== Other Relevant Studies ===
  * [[:GvFinfo|Description]] of the Geant4 v Fluka study. Refined from the original Feb 2011 charge.
  * [[:G4FlukaComp|GEANT4 vs FLUKA]] Comparison Study of mu-induced neutron yield (Empl, Villano)
==== Meetings and Decisions ====
=== Dec 5 2013 ===
  * [[:dm_task_force:dec5-13|Progress on Cosmo Sims and muon distributions]]
=== Nov 25 2013 ===
  * [[:dm_task_force:nov25-13|Progress on Cosmo Sims and muon distributions]]
=== Oct 28, 2013 ===
  * [[:dm_task_force:oct28-13|Progress on Cosmo Sims and muon distributions]]
=== Oct 21, 2013 ===
  * [[:dm_task_force:oct21-13|Progress on Cosmo Sims and muon distributions]]
=== Oct 14, 2013 ===
  * [[:dm_task_force:oct14-13|Progress on Cosmo Sims and muon distributions]]
=== Sept. 30, 2013 ===
  * [[:dm_task_force:sep30-13|Progress on Cosmo Sims and muon distributions]]
=== Aug 8, 2013 ===
  * [[:dm_task_force:aug8-13|MUSUN maps redone, new LS plots]]
=== July 18, 2013 ===
  * [[:dm_task_force:july18-13|Action Items from the July 18 meeting]]
=== July 11, 2013 ===
  * [[:dm_task_force:july11-13|Plot of FLUKA vs Experiment comparisons: Liquid Scint, MUSUN vs Geant4 plots, status of cosmo sims ]]
=== May 30, 2013 ===
  * [[:dm_task_force:may30-13|LXe Sim comparison and MUSUN oddities.  Paper draft]]
=== May 23, 2013 ===
  * [[:dm_task_force:may23-13|LXe Sim comparison and MUSUN oddities]]
=== May 9, 2013 ===
  * [[:dm_task_force:may9-13|Status Reports & White paper]]
=== April 18 ===
  * [[:dm_task_force:apr18-13|Status Reports & White paper]]
=== February 7, 2013 ===
  * [[:dm_task_force:feb7-13|Status Reports & White paper]]
  * {{:20130321_pangilinan_dwg_update.pdf|LZ Update for March 21 Mtg}}
=== January 31, 2013 ===
  * [[:dm_task_force:jan31-13|Status Reports & White paper]] 
  * {{::jan31minutestaskforce.pdf|MINUTES}}
=== December 13, 2012===
  * [[:dm_task_force:dec13-12|Status Reports & White paper]] 
=== November 15, 2012===
  * [[:dm_task_force:nov15-12|Status Reports & White paper Push]] 
=== November 1, 2012===
  * [[:dm_task_force:nov1-12|Status Reports & White paper Push]] 
=== October 4, 2012 Status Reports ===
  * [[:dm_task_force:oct4-12|Status Reports]] 
=== September20, 2012  Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:sept20-12|Link here]]
=== August 23, 2012  Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:aug23-12|Link here]]
=== August 9, 2012  Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:aug9-12|Link here]]
=== July 12, 2012  Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:Jul12-12|Link here]]
=== June 28, 2012  Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:Jun28-12|Link here]]
=== May 24, 2012  Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:May24-12|Link here]]
=== May 10, 2012  Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:May10-12|Link here]]
=== April 19, 2012  Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:Apr19-12|Link here]]
=== April 5, 2012  Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:Apr4-12|Link here]]
=== March 1, 2012 Task Force Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:Mar1-12|Link here]]
=== Feb 2, 2012  Task Force Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:Feb2-12|Link here]]
=== Jan 5, 2012  Task Force Teleconference: Presentations ===
  * Agenda with Presentations [[:dm_task_force:Jan5-12|Link here]]
=== Dec 19  Task Force Teleconference: Presentations ===
  * List of Benchmark Plots and Numbers for discussion: {{:dmtaskforcewiki.pdf|Current LIST}}
  * Agenda with Presentations [[:dm_task_force:Dec19-11|Link here]]
=== Nov 12  AARM Mtg: Dark Matter Depth Task Force  ===
  * Agreed-upon Decisions and Near Term Jobs {{:actionnov12.docx|}}
=== Oct 31 Task Force Teleconference: Detailed List of the Jobs assigned  ===
  * Minutes and job list found [[:dm_task_force:Oct31-11|here]]
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