Searching for possible hidden chambers in the

Pyramid of the Sun

ICRC-2007, Mérida

Pyramid of the Sun

Archeological problem

- Three man-made tunnels (1920-50): no internal structure.

- Radón (1997) measurements: no large cavities (?)

- Moon Pyramide (+2002 results): Internal structure and large tumb!

Alvarez experiment

Giza

Muon attenuation method

Sensitivity

Resolution

Measurement vs. simulation

Simulation uncertainties

Aereal level diagram Digitalization

External shape

Internal density

GEANT-4 simulation

Hypotheticalchamber

Smith Tunnel

SBD method

Projections

Smith Tunnel

Components:- Scintillators- Multiwire PC’s- WFD readout- Telemetry

Detector design

Laboratory tests

WFD readout

On-site workElectricity

Entrance limitation

Laboratory

Current status

- GEANT-4 simulations - Electrical power cabling (~1 km) - Detector shack and ventilation system (controlled

humidity and temperature)

- Commissioning of scintillation detectors - Commissioning of individual MWPC’s - Wireless communications - Laboratory tests of ensemble - Experiment

Participants

Physics InstituteResearchersRubén Alfaro M.Ernesto Belmont M.Varlen GrabskiArnulfo Martínez D.Arturo Menchaca R.Matías Moreno Y. Andrés SandovalTechnicianMario RangelStudentsEmilio Arrieta G.Ana Delia BecerrilAzucena CervantesJuan Manuel LópezRoberto Núñez C.Rémy RecheEsteban RodríguezEdgar Vázquez

Anthropology Institute ResearchersLinda Manzanilla N.Luis Barba P.Economic supportDGAPA-UNAMCONACYT